rehband rx knee sleeve 7mm - black - medium - 1 sleeve rehband the knee bandage is anatomically shaped and has a warming and relieving effect on the joint-stabilizing musculature. it offers a high level of comfort and improves muscle coordination. pain from overwork is relieved and mild injury is prevented. the 7mm neoprene material supports and stabilizes enormously strong and can thus protect the knee even under heavy loads, such. weightlifting, perfect support.