HIGH-DENSITY FOAM: Closed-cell foam supports and cushions the foot for long lasting comfort. FIT PROFILE: Medium volume / Medium profile (Volume refers to the amount of space the insole will take up in your shoe. Profile is how much shape you can expect to feel under your foot) STABILIZER CAP: the rails reinforce the narrow cap to provide structure and support HEEL CUP: helps position the heel to naturally absorb impact SUPERFEET SHAPE: the medium-profile shape puts support right where you need it, but takes up less space in the shoe HIGH-DENSITY FOAM LAYER: closed-cell foam supports and cushions the foot for long-lasting comfort