SOFT&COMFORTABLE WATERTIGHT SEAL: The material of watertight seal is neoprene composite elastic fabric,the elasticity is better, the lighter, the pressure at the seal is small, which makes this Cast cover short leg kids easily pull on and off in a non-painful way, keep blood circulation, more soft and comfortable.<br><br><b>. BLOCK WATER AND MOISTURE OUT: Our diaphragm seal is made of high-quality medical-grade silicone. Tight elastic rubber and not easy to tear material is what keeps cast and bandage dry while bathing, shower or doing other water activities.<br><br><b>. SAFETY AND EASY TO USE: Elastic rubber will not cut off blood circulation. And the cast sleeve can easily slide on pediatric leg cast. No need for tape or straps. Easy pull on / pull off.<br><br><b>. FITS MOST KIDS LEG OR BOOT: PVC/TPU material, best for chemotherapy showering, bathing.The cast protector fits most child's leg size. Length up to 19.5 inches, circumference stretches from 1.5 to 7 inches.<br><br><b>.