Your clothes were washed too hot once
Short answer: A single hot wash shrinks the fabric and slightly loosens the elastic. Dampen the item, gently stretch it back into shape and dry it flat, and you recover most of it. Full recovery rarely happens.
What happens at too high a temperature
Heat releases the tension built into the yarn during production, and the stitches contract as a result. At the same time, elastane loses some of its stretch, right from the very first hot wash. Colors also lose a bit of strength, especially dark red and black.
How to fix it right away
Soak the item in lukewarm water for twenty minutes, squeeze out the water without wringing, and gently stretch it back into shape while it is still wet. Dry it flat on a towel. You rarely get it all back, but often most of it.
What you unfortunately cannot fix
Once the elastic in a waistband or sock cuff has gone slack, it does not return, no matter what you try. The same goes for color that has washed out into the water. That is why a single too-hot wash is worse for underwear and socks than for a plain t-shirt.
Why underwear is hit hardest
See bamboo underwear for men, where the elastic at the waistband carries most of the fit. If it loosens even slightly, the item sits looser right away, and you notice it every day you wear it.
How to avoid a repeat
Set the machine to thirty degrees as your default, and use sixty degrees only for towels and bedding that can take more. Leave a note on the machine if several people in the household use it and the temperature easily gets set wrong.
See the rest of the range
See bamboo clothing for women and bamboo clothing for men, where most styles are marked with the recommended temperature right on the care label.
How much does it actually shrink
Often a couple of percent the first time at sixty degrees, and less on repeat, since most of the tension in the yarn has already been released after the first hot wash.
Is the damage always visible
No. On thick fabric you barely notice it, while a thin item can end up noticeably smaller and tighter to wear.
A wash bag does not prevent heat damage
A wash bag protects against friction and lint from other laundry, but it does nothing to change the water temperature during the wash. Damage from heat happens regardless of whether the item sits inside a bag or not.
Frequently asked questions
How much does a garment shrink at sixty degrees
Often a couple of percent the first time, and less on repeat, once most of the tension has already been released.
Is the damage always visible
No. On thick fabric you barely notice it, while a thin item can end up noticeably smaller and tighter.
Can a wash bag prevent it
No, unfortunately not. A bag protects against friction, not heat, which is the actual cause of the shrinkage.
You can find the full range at Bamboo-Clothing.com.
