Compression socks are medical-grade knit, not gym socks — and the stretch fiber that does the work is the part that heat, softener and bleach destroy first. The good news: proper care takes about thirty seconds of extra thought, and it is the difference between a pair that holds its pressure for months and one that quietly goes slack.
If you peeled your socks off inside out, flip them before washing. Dirt, sweat and dead skin collect on the inside of the knit — that is the side that needs the water and detergent, and a twisted inside-out sock washes poorly.
Cold water protects the elastane — the stretchy fiber that creates the graduated pressure. Hot water is the fastest way to loosen a pair. A gentle or delicate cycle is enough; compression knit does not need heavy agitation.
A small amount of gentle detergent is all you need. Skip fabric softener entirely — it coats the fibers and breaks down the elastane's recovery. Avoid bleach, which degrades both the nylon and the stretch fibers.
A zippered mesh bag keeps socks from stretching around other garments, snagging on zippers and velcro, and vanishing into the drum. It is the cheapest insurance for keeping a pair matched and intact.
Low heat in the dryer is fine. High heat is what damages the stretch over time. If you have time, laying them flat or hanging them away from direct sun and radiators is even gentler and keeps the knit true.
Direct heat from an iron destroys elastane on contact. Wringing a wet sock twists the graduated zones out of shape. Instead, press water out gently between a towel and let them finish drying flat.
The graduated pressure in a compression sock comes from elastane (spandex) knitted with nylon and polyester. Elastane loses its recovery when it is repeatedly exposed to heat, softener and bleach — a sock that has lost recovery feels fine but no longer squeezes.
Skin oils, sweat and lotion work into the fibers during a twelve-hour shift. Washing after each wear resets the fabric so the knit can grip and compress evenly again — it is normal, and correct, to wash compression socks after every use.
NursingRx socks are graduated 18 mmHg at the foot, 16 at the ankle and 14 at the calf. If the knit is twisted, shrunk or stretched out of shape, those zones stop landing where your leg needs them — care is really about keeping the zones calibrated.
Fabric softener or dryer sheets — they coat the elastane and permanently reduce its snap.
Hot water or a hot dryer, which loosens the knit and fades the compression first at the ankle, where you need it most.
Bleach, even diluted, which degrades both the synthetic fibers and the dyes.
Wringing them out — it twists the graduated zones; press in a towel instead.
Ironing to smooth wrinkles — direct heat destroys elastane on contact.
Drying on a radiator or in direct sun for hours, which bakes the stretch out slowly.
Wearing the same pair several shifts without washing — oils and sweat break the fibers down faster than water ever will.
Wash after every wear. A clean knit grips better, compresses more evenly and is kinder to your skin on long shifts.
Own at least two to three pairs so you can rotate — one on, one in the wash, one ready — instead of stretching wash days.
Replace your pairs when the cuff slips, the heel bag loosens, or they slide on noticeably easier than they used to. That ease is lost compression.
After every wear. Sweat, skin oils and lotion build up in the knit over a shift and degrade the elastane if they sit. Washing daily actually helps the sock: it resets the fibers so the graduated pressure stays even. Owning two or three pairs makes a daily wash easy.
Yes. Use cold water, a gentle cycle, mild detergent and ideally a mesh laundry bag to prevent snags and stretching against other clothes. Skip fabric softener and bleach entirely — both break down the stretch fibers that create the compression.
On low heat, yes. High heat is what damages elastane over time. If you want them to last longest, lay them flat or hang them to air dry away from radiators and direct sunlight. Never iron them and never wring them out — both distort the graduated zones.
Yes — it is one of the fastest ways to kill them. Softener coats the elastane fibers and reduces their ability to recover after stretching, which is exactly what compression relies on. Dryer sheets do the same thing. Skip both.
When the top band slips, the heel or toe goes baggy, you see thinning or runs in the knit, or the socks slide on noticeably easier than when they were new. Easier to pull on means less pressure. With daily wear and proper care, most pairs hold their compression for months of regular rotation.
It is a good idea. A quick cold wash removes any residue from manufacturing and lets the knit settle to its working shape. Wash them the same way you will going forward: cold, gentle, mild detergent, no softener, low heat or air dry.
This page is general information, not medical advice. If compression garments were prescribed to you by a clinician, follow the care instructions that came with your prescription, and speak with your clinician about fit or wear questions.
Related reading: how to put them on, how long to wear them, the sizing guide and the answers hub.
Tested by nurses. Designed for long shifts.
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