ALPS Extreme Sleeve has superior comfort provided by ALPS Gel. The SFK has limited vertical stretch, and the elasticity of the fabric still allows the user excellent freedom of knee flexion. The Extreme sleeve also achieves secure suspension by sealing with the skin without restricting circulation, while the Grip Gel sticks to the patient’s skin without causing shear forces. The Gel will help prevent the sleeve from rolling down the amputee’s limb.