Activa Hosiery Kit Below Knee Stocking and Liner 40mmHg Small, Sand White 3593 Film backing prevents strikethrough and Film backing prevents strikethrough and protects against external bacteria and viruses* *In vitro testing shows that the transparent film provides a viral barrier from viruses 27 nm in diameter or larger while the dressing remains intact without leakage this makes them more easily absorbed by the body than the triglyceride form of Omega 3 found in fish oils Refer to the size chart image in the product photos for instructions Sizing & Measurement Guidelines: Accurate measurements are essential for effective graduated compression hosiery