A unisex arm sleeve from Truform's Ready-Wear Upper Extremity range, knit in a lightweight microfiber knit, finished with soft top. It delivers 20-30 mmHg firm graduated compression. Most wearers are managing swelling of the upper limb following trauma, surgery or radiation therapy. Browse our lymphedema range.

The numbers are the pressure at the ankle, measured in millimetres of mercury, decreasing as the garment moves up the limb. At 20-30 mmHg this is Truform's firm class, and the most commonly prescribed level. Truform indicates it for tired aching legs, moderate varicosities, moderate varicosities during pregnancy, moderate edema, post-sclerotherapy and other surgery, superficial thrombophlebitis, and helping prevent recurrence of venous ulcerations. If you're unsure which level applies, our compression therapy guide explains each one, or see our varicose veins.

Compression sizing isn't standardised across brands — a Medium in one brand is often not a Medium in another, so go by your measurements rather than the size you wore last. Measure around the smallest part of your wrist, around the largest part of your forearm and around your mid-upper arm. Only three measurements are needed for ready-to-wear sizing. If your swelling has changed, or you've gained or lost weight, or you're recovering from surgery, re-measure rather than reordering your previous size. Our measuring guide walks through each measurement.

Gather the sleeve, place your hand through and draw it up the arm in stages, smoothing rather than pulling. Check there are no folds or bunching at the elbow, since a fold concentrates pressure in one spot. Rubber gloves help with grip. Full instructions are in our guide to putting on compression garments.

Wash after each wear in cool or lukewarm water with a gentle solution — never fabric softener or bleach — and always air dry away from direct heat, since a machine dryer permanently damages the elastic. With daily wear and proper care, expect roughly three to six months before the compression declines, so most people rotate two pairs. Full instructions and washing solutions are in our care guide.