Energize your legs! Using integrally-knit graduated compression, these compression socks apply therapeutic pressure that starts at the ankle and gradually eases above. It's this external pressure that energizes your legs and reduces swelling. These socks have a 30-40 mmhg compression level that is ideal for all-day, everyday wear, sitting or standing for long periods. The moisture-wicking fabric helps draw sweat and moisture off of the skin and onto the top of the sock fabric to keep your feet dry & comfortable. These socks are specially designed to energise legs, reduce swelling, alleviate achiness & heaviness and to aid in muscular recovery. The specially designed fabric nylon and the 400-needle count gives supreme comfort and flexibility which contours leg and heel for superior fit. These socks are comfortable and breathable with graduated compression from ankle to calf with a contoured leg and heel for a great fit. The flexible toe pocket doesn't squeeze the toes! Tested & trusted: based out of missoula, montana, vim & vigr is dedicated to creating products that provide you with everyday relief. Vim & vigr graduated compression legwear was developed in partnership with vascular surgeons and vein clinics and all products are listed with the food and drug administration (fda). These compression socks are available in black and 3 sizes: small/medium, medium/large and large/x-large. They're made out of 83% moisture-wick nylon, 17% nylon (latex-free) and are machine washable.