These gel liners are designed to provide maximum mobility and protection to the residual limbs by comfortably conforming around the bony prominence of the below-knee (Trans-tibial) residual limb. The gel liners are adaptable with most prosthetic socket designs, hand-washable and reusable. Manufactured out of 100% Cool Max material. The Double Socket Gel Liner™ is a two-layered prosthetic liner which is equivalent to a 5 ply sock. It works like two prosthetic socks with the Silipos® proprietary polymer gel impregnated in between the two socks.