Titan neoprene knee sleeves, perfect for high-weight training. - Brand: TITAN - Product Name: TKS Knee Sleeve - Material: Neoprene - Included: Storage bag Thank you for viewing. Titan high-rebound knee sleeves. TKS, size S I purchased these used on Mercari and tried to put them on, but I couldn't get them on and gave up. I think they are still usable, so please someone use them. Note that both the left and right sleeves have a tear of about 5 cm on the upper (thigh side) part, but I think they still have considerable rebound.