From the makers web site - 'Provides light compression and should be used for superficial or early varicose veins and swollen ankles (e.g. during pregnancy).
NEW BLACK ACTIVA BLACK BELOW KNEE OPEN TOE COMPRESSION XXL
Activa Light Compression Below Knee, Closed Toe, Stockings (Class 1)
Sigvaris Essential 'Coton' Compression Below Knee for Men (15-20mmHg) AFNOR...
AntiEmboFit- Compression Below knee Anti Embolism Stockings
Fitlegs Medical Travel Anti Embolism Compression Below Knee Socks. Size Large
Actilymph Compression Below Knee Stockings Pair Class 1 Small Black