IMPACTO Gel Comfort Kneepads. Donut shaped gel filled liner. Durable grain leather cover with snaps to attach to gel pad. Top strap is elastic 1.5 wide x 13 long with hook and loop closure. Bottom strap is nylon webbing 1.5 inch wide x 13 inch long and has plastic buckle with metal button closure. Manufactured with 100% pvc-free materials.