Does hot or cold water shrink jeans?
Wash jeans in warm water: Most of the time when you have something that you want to wash gently you wash it in cold water. But that's not the case when you are washing denim jeans. Warm water will help the color stay in the jeans and help keep the jeans from shrinking. Hot water is too hot and can destroy the fabric.
Hot Water Method
"The easiest, quickest way to shrink denim is to wash and dry them on the hottest temperatures possible—similar to the way that washing your favorite sweater in hot water and putting it in the dryer is something you try to avoid because it will shrink."
Jeans are fairly bulky and can take up a lot of space, especially when they are wet. Fill up a large sink or a bathtub about halfway full with water that is slightly below room temperature. Cold water will prevent the jeans from shrinking and fading because it doesn't break down the fibers of the denim.
Even though it's hard to pinpoint a specific temperature that causes denim to shrink, it is safe to say that some shrinking will occur if denim is exposed to temperatures that are 85 to 90 degrees or higher. Washing your jeans with water that has a temperature below 60 degrees will usually prevent shrinking.
For those who haven't, it's simple: just toss your jeans in the washing machine using hot water, and then the dryer until they're completely dry. The heat from the dryer will shrink them well.
Throw Them In The Dryer
Heat naturally shrinks fabric, so the quickest and easiest way to shrink your jeans is to put them in the washer and dryer. Grab the jeans you want to shrink and put them in the washing machine on the highest heat setting it has.
Let us explain: A pair of raw-denim jeans typically shrinks 7% to 10% after the first wash and continues to conform to the wearer's body after every wash and wear. That's why it's crucial to keep shrinkage in mind when buying a pair of raw-denim jeans.
Need to know how to shrink jeans without a dryer? For that classic, rigid denim feel, pop your jeans into a hot wash and then simply dry them on the line on a sunny day. This method is particularly good at shrinking jeans that are too long or too loose at the waist.
Cold water does not shrink clothes. In fact, cold water can help prevent shrinkage, and color loss. Cold water is also the ideal wash temperature for “dry clean” items.
Heat can break down dyes in the clothes and cause shrinkage. Thus, by washing clothes in cold water, colors last longer and clothes retain their size and shape.
Do jeans shrink in cold weather?
To prove it, we asked Pat Slaven, a Consumer Reports fabric expert: Does fabric shrink in the cold? “Technically, yes,” said Slaven, an engineer and a textile chemist. “As the temperature drops, density increases. That means volume decreases.
While you can manually shrink pure cotton jeans by submerging them in boiling water for 30 minutes, stretch jeans containing polyester or spandex can be damaged at higher temperatures, resulting in melted patches or permanent loss of elasticity. Spandex gets damaged at temperatures as low as 356 degrees Fahrenheit.

Always take the smaller size as cotton tends to grow when it doesn't have a stretch fabric mixed into the cotton. It will shrink slightly on washing and stretch again when worn.
"Both hot and warm water may cause certain fabrics to fade or shrink," she notes. "However, hot water shrinks items to their maximum shrinkage capacity after one wash, whereas warm water will shrink them more gradually over multiple washes."
Like washing jeans in hot water, turning your dryer on the highest heat setting is the best way to shrink jeans, whether they are stretchy or regular denim. When finished washing the jeans, put them in the dryer and run them on a regular cycle until they are completely dry.
How much will jeans shrink? In general, expect up to 3–4% shrinkage, which on a pair of jeans with a 32″ inseam would mean shrinking about 1″–1¼” in the length. The width is much less prone to shrinkage because there is less applied tension in that direction during fabric construction.
- Fill your tub with hot water (as hot as you can bear).
- Put on the jeans and get in the tub.
- Stay there until the water has cooled down.
- Get out of the tub and, while still wearing the jeans, sit in the sun while the jeans air dry [source: Shrinking Jeans with a Bath].
You can shrink just the waist of your jeans or pants in several different ways, including using the boiling method or the wet sheet or hairdryer methods. To use the boiling method on just the waist of your jeans, you will want to lower just the waist of your jeans into the pot of boiling water.
Why Do Jeans Shrink in the Wash? Denim is made from cotton which is susceptible to shrinking in the wash. This is because the heat from the water causes the fibres to first expand and then once the water has drained, the fibres contract, becoming smaller.
All jeans will stretch to varying degrees over time, explains Dean Brough, academic program director of QUT's school of design. "Jeans by nature actually do stretch. The fabric is meant to morph and form to the body which is why we love them," he says.
Should jeans be tight at first?
Jeans should be comfortably tight at first. If the jeans your trying on are really uncomfortably tight then they will probably only stretch a few inches. The best way to see if the jeans are going to be good for you is to do the sitting test. Sit down as you would in a car, and see how it feels.
"You should wash jeans every six weeks. Washing them more than that will wear them out faster, and you'll have to buy a new pair within a year. If your body chemistry makes your jeans stink after two days, fold them up and put them in the freezer overnight.
Here's how it works: Heat a large pot of water until it reaches a rolling boil, then place your jeans in, making sure they are fully submerged. Leave them boiling for twenty to thirty minutes, and then drain them as much as possible. Once drained, then dry them on high heat.
Washing clothing in hot water will even do better in killing germs and stopping the spread more efficiently than cold water will.
Washing in cold water can help slow fading of colors and shrinking in fabrics. Cold water can also help your clothes last longer. "Washing in cold water can help slow fading of colors and shrinking in fabrics," says Stephen Hettinger, director of engineering in washer systems at GE Appliances.
For example, both cotton shirts and denim jeans will shrink more in a warm or hot wash, followed by a high heat drying cycle. Steam heat will effectively shrink wool clothes, and some fabrics will even shrink when soaked for long periods in warm water.
The best way to wash colored towels is with warm water and color-safe bleach, if necessary. For white towels, use hot water and non-chlorine bleach as needed. White towels should be washed separately or with other white items to avoid subtle discoloration over time.
According to Brian Sansoni, the senior vice president of communications for the American Cleaning Institute, “Most laundry can now be done in cold water. That should be the default.” And yes, he includes towels in that statement. This is good news for your wallet!
Cold water is fine for most clothes and other items that you can safely put in the washing machine. It can remove many stains from clothing, including grass on your kid's jeans or makeup smudges on a sweater. Delicate fabrics (lace and silk) and dark, colorful fabrics actually do best in cold water.
Cold water helps dark wash denim retain color; however, hot water cycles clean clothes better. Wash your denim sporadically in warm water for the best of both worlds. Denim is a dyed fabric that will bleed as you wash. Protect your other clothes by washing all of your denim in its own load.
Will Levis shrink in hot water?
Most of our jeans have been preshrunk, so there should be very little shrinkage if any. We recommend you purchase the size that fits you best before washing, and they should still fit fine after washing. To minimize any shrinkage, we suggest you wash your jeans in cold water and line dry.
Constantly pulling up the waistband of your pants is no fun. It means that either the inseam is too short or the waist is a tad too small. “I always tell my clients, if you need to constantly fix, fidget, and fuss with any clothing item, it doesn't fit and it's time to get newer options,” says Stuart.
(Image above, right) If you can't lift up your legs or squat without feeling like your jeans might rip, it's too tight. If you can grab a handful of denim from butt area, or confidently smuggle a football thanks to the extra room, it's too big/baggy.
In most cases, jeans make popping sounds when you walk because they are not the right fit for you or the material is not the best quality. The best way to prevent jeans from being uncomfortable and making popping noises when you walk is by fitting them and walking in them before you make a purchase.
What fabrics shrink in warm water? Typically, fabrics made of natural fibers like wool, linen, cotton or silk are more prone to shrinking when washed in warm or hot water.
Should You Wash Clothes in Hot Water? | Consumer Reports
According to cleaning product manufacturer lobby American Cleaning Institute (ACI), washing clothes in cold water as instructed by care labels can prolong garments' life and vibrancy and prevent shrinkage. The same is true for linens and other home textiles, many of which can be machine washed at home.
To boil jeans, place them in a hot pot of water for 20 to 30 minutes, depending on how much you want the item to size down. Then, toss in a dryer on the highest setting for for the most-effective shrink.
While you can manually shrink pure cotton jeans by submerging them in boiling water for 30 minutes, stretch jeans containing polyester or spandex can be damaged at higher temperatures, resulting in melted patches or permanent loss of elasticity. Spandex gets damaged at temperatures as low as 356 degrees Fahrenheit.
Cold water does not shrink clothes. In fact, cold water can help prevent shrinkage, and color loss. Cold water is also the ideal wash temperature for “dry clean” items.
Does hot water stretch jeans?
Put on the jeans that are too snug, fill a bath with warm water, and sit in it. The warm (not hot!) water will help loosen and stretch the threading a bit. You obviously need to do this one in advance, and allow the jeans to hang dry when you're done.
Submerge the jeans into the boiling water for 20-30 minutes.
Boiling your jeans will shrink them faster than putting them in the washing machine, so adjust the time depending on how much shrinkage is required, and leave them in for a shorter amount of time if you are unsure.
How much will jeans shrink? In general, expect up to 3–4% shrinkage, which on a pair of jeans with a 32″ inseam would mean shrinking about 1″–1¼” in the length. The width is much less prone to shrinkage because there is less applied tension in that direction during fabric construction.
Here's how it works: Heat a large pot of water until it reaches a rolling boil, then place your jeans in, making sure they are fully submerged. Leave them boiling for twenty to thirty minutes, and then drain them as much as possible. Once drained, then dry them on high heat.
Heat can break down dyes in the clothes and cause shrinkage. Thus, by washing clothes in cold water, colors last longer and clothes retain their size and shape.
Delicate fabrics (lace and silk) and dark, colorful fabrics actually do best in cold water. Not all stains respond to warmer water. For example, blood and sweat can actually set into fabric in hot water. Also, hot water tends to shrink, fade, and wrinkle certain fabrics.
Washing clothing in hot water will even do better in killing germs and stopping the spread more efficiently than cold water will.
Washing and drying in high heat will help shrink denim, but the effects are temporary. Denim naturally stretches with time and movement, so they'll likely loosen again. To permanently take denim down a size, hem them at home or bring your jeans to a tailor.
Heat It Up
The way everyone shrinks their jeans is simple: HEAT! Wash them in hottest setting and then dry on hottest cycle. The heat causes all the fibers in the denim to contract, making the pair smaller.
Always take the smaller size as cotton tends to grow when it doesn't have a stretch fabric mixed into the cotton. It will shrink slightly on washing and stretch again when worn.
Why do I constantly have to pull my jeans up?
Constantly pulling up the waistband of your pants is no fun. It means that either the inseam is too short or the waist is a tad too small. “I always tell my clients, if you need to constantly fix, fidget, and fuss with any clothing item, it doesn't fit and it's time to get newer options,” says Stuart.
Fully wet your jeans in lukewarm water either in bathtub or a basin. Put them on (while wet, I know!), and do some movements that'll stretch them out like lunges, squats, bending over, walking, sitting, etc. You can also do the movements without wetting the jeans, but the water helps loosen and soften the threads.
Soften With a Vinegar Soak
White vinegar is a natural solution that can soften denim fabric. Make a softening solution for your jeans by combining eight cups of hot tap water with one cup of standard white household vinegar (like this one from Heinz, $9) in a clean bucket or plastic tub.