SEAL-TIGHT Original Cast and Bandage Protector for daily showering, therapeutic care or bathing only (see our DryPro listings for protectors suitable for swimming and aquatic exercise). Durable polyvinyl bag prevents water penetration and lasts 6-8 weeks with daily usage and normal care. Excellent for a situation which requires the protection of a cast or bandage. SEAL-TIGHT also protects skin against water penetration e.g. ulcers. Nonlatex diaphragm stretches over cast or bandage to form watertight seal. Size: Length 39 inches Sizing of Adult Long Arm: Measure from tip of finger to top of cast and add 1 inch. Hole Size: 1 5/8″ Circumference Range: 8″ – 17″