DESIGNED TO FIT COMFORTABLY UNDER OR OVER PANTS, MEDIUM DENSITY EVA FOAM FOR COMFORT & LONGEVITY, LOW PROFILE CONTOUR FOR EASY MOVEMENT, QUICK RELEASE SLIDE CLIP, SOFT GEL CORE & DURABLE EVA FOAM PADDING, HEAVY-DUTY THICK PVC CAP, FLEXIBLE NEOPRENE STRAP FOR EASY ADJUSTMENT.