Varisan Lui & Lei Preventive Knee-sock 10-15mmHg REAR VIEWING SHOES VARISAN HIM & LEI COTTON ON LEATHER 15mmHg, are graduated compression knee highs. 1A Graduated compression class ASQUAL 10-15mmHg certified Indications: prevention of prolonged standing edema prevention of venous thrombosis of the traveler symptomatic treatment of venous insufficiencies in the initial phase. Cotton on the skin Compression class mmHg 1a 10-15 2a 15-20 Contraindications: hypodermic dermo in acute form, non-venous origin infections, known contact allergy to elastic guardians.