premium quality Nylon/Spandex from our FDA approved facility Medical pantyhose are tighter than regular one. Pls, refer the size chart (third picture) has length, ankle, calf, thigh and waist size rather than S, M, L, XL, XXL. Attention: After adding to cart, lock SWOLF STORE brand, prevent buying FAKE items sold by other unauthorized sellers. ??MEDICAL??Real medical weight compression pantyhose provide 20-30mmHg graduated compression from ankle to thigh. Designed to help relieve moderate conditions associated with poor circulation, blood clots, edema, swelling, and varicose veins etc. Thick and smooth medical fabric help conceal the unsightly appearance of the leg. ??PROFESSIONAL??Just like the big name brands, we take 4-6 measurements at precise intervals between the ankle and end of leggings. Multiple measurements guarantee our compression leggings deliver an accurate distribution of the pressure gradient and precise size. This largely avoids the problems that are common in similar products such as being too long and the waist is too tight. All products are designed and engineered with your comfort and treatment in mind. ??MATERIAL??Medical compression tights made with Nylon & Spandex, Latex Free. Strengthen elastic waist & crotch junction help to avoid the problem of waist slip down and easy tearing of the crotch region. Reinforced heel & toe enhanced durability. These elastic tights provide maximum strength and hiding power. ??Application??Comfortable for all day, everyday use, people who often long-standing or long time to maintain a posture. Suitable for walking, sitting, standing, travel and all attire from casual to work, dress or formal. We used two-way stretch design provides extra comfort & makes them easier to get on. But in order to ensure the treatment effect, these pantyhose still provide a strong compression and tight material which makes it hard to get on at the first time for someone. ??Guarantee??Buy without any risk! Your satisfaction is our aim. You have got our No-Questions-Asked 30-Day Money-Back Guarantee. If you don??t absolutely satisfy your Compression Stockings within the first 30 days, we??ll take them back and refund, no questions asked! You will get a satisfactory solution and five-star service.