How Often Should You Replace Your Underwear? (How Long Do They Last?)

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Lifespan Of Underwear

Underwear is an essential part of your wardrobe. However, it’s always a good idea to purchase new underwear on a regular basis. You will have to replace your underwear over time because they get dirty, worn, or torn and you should throw away underwear that is beyond repair.

While there are many factors that affect the lifespan of your underwear, you can help them last longer by taking proper care of them.

There are many factors to consider when determining how long underwear will last. First and foremost, it depends on the type of underwear that you wear. Boxer briefs can last longer than boxer shorts because boxers have more material to them (like the legs) and therefore are able to hold up for longer periods of time.

The age of the person wearing the underwear also plays a part in how long they will last. A teenager who is still growing will be able to get more use out of their underwear than an older person who has stopped growing or is even shrinking in size.

Let’s dive in and take a look at a wide variety of circumstances and how long different brands of underwear last…

How Often Should You Replace Your Underwear

Underwear doesn’t last forever, but it might not need to be replaced as often as you think. The durability of most underwear is more about the fabric and style than the brand.

Since underwear is worn close to your skin, it’s important to replace them regularly. It’s also a good idea to have a few pairs on hand in case you run out unexpectedly.

There are a number of factors that affect how long underwear lasts, including:

  1. Your personal care: Do you wear your underwear more than one day at a time? Are you frequently sweating? Your hygiene habits can impact how fast they get dirty or smelly.
  2. Underwear material: Cotton and silk tend to last longer than nylon and spandex.
  3. Brand: Not all brands are created equal, but quality construction can make some styles last longer than others.
  4. The frequency of use: How often do you wear your underwear? Do you wear them every day or only occasionally? If you rarely wear them, they’ll probably last longer. If you’re wearing them every day, they’ll get worn out quicker.

The lifespan of underwear varies depending on the brand, fabric, and care. Boxers and briefs tend to last longer than other types of underwear like thongs and g-strings. Lacy or fancy styles that have more intricate details can wear down faster if they are not cared for properly.

Underwear made from natural fabrics tends to last longer than synthetic blends. Cotton is one of the longest-lasting fabrics that you can wear next to your skin because it breathes well and wicks moisture away from your body.

That said, you should replace your underwear if you notice any deterioration or damage to the material or stitching. You should also replace them if they start to smell bad at all or if you notice small holes appearing in the fabric. Any of these things are signs that the garment has passed its best and so it should be replaced immediately.

How Long Do Underwear Last?

How long do underwear last? It depends on a number of factors, including how you take care of them.

The specific time depends on how often you wear them and how often you wash them. You may have to throw out your underwear earlier if they become too worn, dirty, or uncomfortable.

However generally speaking you should replace your underwear every two years to keep yourself clean, comfortable, and healthy.

Below we’ll go over some of the most important factors in determining how long underwear will last.

Treatment Of Underwear

How you treat your underwear has a lot to do with how long they’ll last. Washing machine and dryer settings, detergents, and fabric softeners have an impact on the longevity of your underwear. Wash new pairs of underwear before wearing them to remove any chemicals used in the manufacturing process and always check the tag for washing instructions before putting your underwear in the laundry.

Drying Your Underwear

Air drying is preferable to machine drying and cotton underwear should be hung to dry so that they don’t shrink. Polyester or nylon panties can be machine dried on low heat but avoid high heat as it can damage elastic and decrease the longevity of your undergarments.

Sizing Of Underwear

Sizing is pretty self-explanatory but it’s worth reiterating that a good fit is paramount in ensuring longevity. Too small and panties won’t stay up or provide adequate coverage while too big will leave panty lines in your clothing. If you’re in doubt, err on the side of caution and buy larger sizes than smaller ones.

How Long Does Calvin Klein Underwear Last?

Calvin Klein underwear is popular for its durability and comfort. The material is soft and breathable, making it ideal for everyday wear. The underwear comes in a variety of styles, from briefs to boxer briefs to thongs.

So all of the different styles will have different durability however they are all easy to care for and long-lasting.


Calvin Klein Women's XS-XL Modern Cotton Bikini Panty, Black, Medium


There are many factors that determine how long Calvin Klein underwear lasts. The most important factor is the material. The material of Calvin Klein underwear is usually made of cotton, and cotton is a durable fabric. It is soft, so it also makes the underwear comfortable to wear.

One thing is for sure Calvin Klein underwear will last just as long and if not longer than other brands.

How Long Do Boxers Underwear Last?

In general, boxers’ underwear’s life span is determined by how well you take care of them. I personally buy boxer briefs from Under Armour and have always worn them for about two years before replacing them. However, if you do not follow basic care instructions, your boxer’s underwear is going to wear out much faster than that.


Under Armour Men's Charged Cotton 6-inch Boxerjock 3-Pack , Black (001)/Black , Large


  1. For example, you should never wash your boxer’s underwear in hot water. These items are made from a material called polyester and will melt in a hot wash. Also, you should always make sure that the item is fully dry before storing it away. This will help prevent mildew and any other unwanted odors.
  2. Another simple way to increase the life span of your boxer’s underwear is to remove them from your laundry as often as possible. When you do place them in the machine for washing, place them in an individual bag to prevent any possible damage or snagging from occurring.
  3. Boxer shorts can last up to three years when following regular care instructions, but they can last less than six months if they are not taken care of properly.

The problem with boxers for men is that eventually the elastic will wear out and the waistband will start to fall apart. This means that you will have to throw them away and buy another pair. It doesn’t matter if you have only worn them on occasion or if they are your favorite pair of underwear; they will need to be replaced at some point.

How Long Do Saxx Underwear Last?

Saxx is a great brand of underwear. Their underwear is very durable, and they are an amazing value for the price. They have a longer lifespan than other brands.

Saxx underwear is designed to be very resistant, so it can last a long time. Saxx underwear lasts longer than other brands because they use only the best fabric to make them. 


Saxx Underwear Men's Boxer Briefs - Daytripper Boxer Briefs with Built-in Ballpark Pouch Support – Pack of 2, Black/City Blue Heather, Large


However, they are also made of materials that can be damaged if they are not treated with care. The life span of a pair of Saxx underwear will also vary depending on how much you wear them!

  1. Saxx underwear is made from high-quality fabrics and should last longer than average. However, there are a few factors that can shorten their life cycle.
  2. Treat your Saxx underwear with care and they can last a long time. Bad treatment will shorten their life. Let’s see what you shouldn’t do with your Saxx underwear.
  3. Don’t use bleach to clean your Saxx underwear. Bleach is not good for any fabrics, but it is particularly harmful to some of the ones used by Saxx, such as Modal, Pima Cotton, and Spandex. So if you want to keep your underwear in perfect condition, avoid using bleach at all costs.
  4. Don’t use fabric softener on your Saxx underwear either. Fabric softeners contain chemicals that weaken the fibers of your Saxx underwear and make them less resistant over time. If you think that is not such a big deal when it comes to your underwear, think again! Fabric softeners reduce the elasticity of the fabric and decrease its resistance to wear and tear over time.

How Long Does Shreddies Underwear Last?

Shreddies is a brand of underwear that is the perfect way to treat flatulence issues. Apart from being able to wear the garment whenever you like, the most impressive thing about Shreddies is that the activated carbon lining can absorb all flatulence odors.

The fabric in Shreddies remains effective for the life of the garment (2 to 3 years) providing our wash care instructions are followed correctly. The fabric and material are very durable.

Treating Flatulence Issues

Everyone passes wind on a regular basis, but for some people, passing wind can cause them a considerable amount of embarrassment and discomfort. Those who suffer from excessive or uncontrollable flatulence may find that their lives are made intolerable by their condition, as they are unable to control when they pass wind or where it will end up. It is this aspect of flatulence that has led product manufacturers to produce products such as Shreddies underwear, which is designed to combat this very issue.

Treating Specific Conditions

The official Shreddies website claims that the underwear can be used by sufferers of irritable bowel syndrome and other similar conditions, which can be exacerbated by an excess gas build-up in the intestines and colon. The activated carbon lining of the underwear absorbs all odors emitted from these areas of the body and neutralizes them before they have a chance to offend.

How Long Does Knix Underwear Last?

So, how long does Knix Underwear last? The answer is, it depends. It depends on lots of things, including your weight and whether you’re working out or not. It depends on whether you’re pregnant or breastfeeding. It depends on how often you wear them, and in what conditions.

But here is the great thing about Knix underwear… They are reusable, machine washable, and you can expect them to last about 2 years.

In fact, a single pair of Knix can last for quite a few years if you look after them by washing them as per the companies instructions.

Now if you are wondering how long they last while you are wearing them during that time of the month they can be worn every day and all day. Plus you can wear them whether you’re on your period or not.

As with any underwear, if you find that your Knix is getting worn out faster than normal (holes in the fabric, etc.) then it’s time to replace them.

How Long Does Tommy John Underwear Last?

Tommy John underwear is made with high-quality micro modal fabric for a comfortable fit. The fabric is very soft and does not irritate the skin as much as cotton does. The fabric is also very durable and will stand up to your active lifestyle.

What makes Tommy John underwear so long-lasting? The design of the garments themselves contributes to their durability, as well as their unique properties such as comfort, moisture-wicking, and breathability.


Tommy Hilfiger Men's 3-Pack Cotton Boxer Brief, Black, Large(36-38)


The type of care you give your Tommy John underwear will determine how long they last. There are many brands of underwear on the market but few of them can compete with the quality offered by Tommy John boxers and this makes them worth the cost.

It is hard to find a definitive answer about how long this underwear lasts with reports of 5 to 7 years not being uncommon.

One customer reported that he purchased a Tommy John garment and wore it three to four times a week for five years before he needed to replace it. He reports that the garment retained its shape and color throughout the time he wore it.

No matter which way you look at it this is a very impressive brand of underwear.

How Long Does Period Underwear Last?

Period underwear, more often referred to as period panties, are a great alternative for women who are looking for an alternative to pads or tampons.

Period panties with liners have a shorter shelf life than full-coverage period panties as the liner gets damp and less absorbent over time. Full-coverage period panties should last for about 6 months to 2 years if properly cared for.

As far as how long they last for each wear. Period panties last up to 10 hours, which is longer than a tampon. If you’re looking to menstruate discreetly at work, they might be a good option because of their longer lifespan. They also don’t require any changes every few hours in order to feel fresh.


Bambody Absorbent Panty: Period Panties/Maternity & Postpartum Underwear (Medium, 3 x Black)


Period panties come in two different styles: underwear with an absorbent liner on the inside or full-coverage underwear that looks like regular panties. Both styles are designed to be worn during menstruation only and are usually made from cotton or another breathable material that allows the skin to breathe.


Can Underwear Hold Bacteria?

You may be asking yourself, “Can underwear hold bacteria?” Well, the answer is yes, but whether or not it can harbor harmful bacteria depends on the type of fabric. Cotton underwear is more likely to get stinky and develop bacteria than underwear made with other materials.

Avoid wearing the same pair two days in a row unless absolutely necessary. This is because bacteria will start to build up and your boxer briefs may smell bad if you don’t change them regularly.

There are several techniques to prevent bacterial growth in your underwear:

  1. Buy cotton underwear (breathable) instead of synthetic ones. Synthetic fabrics tend to retain moisture and increase the risk of yeast infections. Cotton is 100% breathable, which will let the skin breathe.
  2. Wash your underwear with other clothing items and not on its own, because you don’t want the other laundry items to come into contact with your genitals directly.
  3. If you’re not able to wash them every day (which is ideal), at least make sure that you wash them once a week or so.*
  4. Use anti-moisture ingredients in the washing powder like zeolites, which will absorb moisture and kill microorganisms.
  5. Use a tumble dryer until they’re completely dry because letting your clothes get wet might cause bacterial growth when they’re damp. Wet clothes can also lead to a damp environment where bacteria can thrive.

Underwear does not typically have large amounts of bacteria on it unless it is visibly soiled or has been worn for several days with no washing. Therefore, if you wear underwear for a few days without washing it, you are unlikely to contract any serious illnesses.

Wearing dirty underwear can irritate your skin and cause rashes or boils. If you notice any irritation on your skin after wearing underwear multiple days in a row, wash the underwear immediately.

Does Underwear Expire?

Tighty whities, briefs, boxers, and thongs don’t actually have an expiration date as food does. Underwear usually has a pretty long shelf life. This is especially true for cotton boxers, which are less absorbent than briefs and don’t come into contact with sweaty skin as much as they do during strenuous activities like running or working out.

Underwear doesn’t expire. And that’s the truth. Still, there are a few things you should do to make sure you get the most out of your underwear.

What to do:

  1. Wash them correctly – Underwear should be washed in warm water (30-40 ˚C) using a mild detergent. Colorful or patterned underwear should be washed separately as they may bleed onto other items of clothing. Avoid washing them with towels or bedding because they may catch lint.
  2. Store them correctly – Ensure that your underwear is properly stored in an appropriate place away from direct sunlight, moisture, and heat. Fold the items and store them in a drawer or on a shelf. Do not hang underwear outside to dry as this will cause damage and result in the fabric losing its elasticity.
  3. Renew them – After prolonged wear, cotton fabrics can lose their elasticity and their ability to absorb moisture, which can lead to discomfort and skin irritation.

In summary, how long underwear lasts is a question that most guys don’t give much thought to, but it is important to know. It’s not just a case of wearing them until they become unwearable; it’s more an issue of comfort, both in terms of hygiene and also with regards to the fabric becoming brittle or stained.

Towards the end of their usefulness, underwear can become uncomfortable to wear and this will make them less appealing. They will also start to smell bad because they have started to decay and this won’t be pleasant. As a general rule of thumb, you should replace your underwear every two years.

You may also be interested in… What Are Seamless Underwear? and Why Do Dogs Eat Underwear?