PERFECT FIT: JOMI is a Medical Quality Brand, commonly purchased in surgical supply stores where they are professionally fitted. To fit them yourself we have provided detailed instructions. Please see sizing instructions in the Images section. 15-20 mmHg Compression provides relief from minor to moderate swelling, aching, spider and varicose veins, especially during pregnancy. It is beneficial for individuals who stand for long periods of time and is ideal as a travel sock in preventing DVT. Jomi opaque pantyhose are crafted of a Nylon and Spandex yarn designed to be cool and breathable. The two way stretch design makes them easy to wear and the opaqueness will mask varicosity, blemishes and scars. Made in USA. Certified medical grade compression garment. Approved for Class I Gradient Compression Therapy. Mild Support, Women's Pantyhose.