BLOCCS Waterproof Cast Cover for Kids Arm (Small) — CA79-S Natural Rubber, Reusable Seal for Swimming & Showering

BLOCCS 100% waterproof cast cover (CA79-S) is a reusable natural rubber sleeve that keeps small children's arm casts, bandages, and dressings dry during swimming, bathing, and water play.

When a child has an arm cast or dressing, staying active can feel risky — BLOCCS' small arm sleeve is sized for roughly 3–6 year olds and gives a watertight barrier so kids can swim, shower, or splash without soaking the injury. Made from soft, flexible natural rubber, this sleeve fits over the injured limb and seals at the arm to block water while remaining comfortable for short- to medium-duration activities.

How does this cover protect a child’s arm during swimming or showering?

The BLOCCS sleeve forms a waterproof barrier over casts, bandages, and dressings, preventing water ingress that could irritate wounds or damage plaster. Its natural rubber material stretches to accommodate the covered area while creating a snug seal around the upper arm to stop leaks during typical pool and shower activities.

• 100% waterproof construction designed for immersion and splashing
• Seals at the arm circumference to block water entry
• Suitable for pools, beaches, waterparks, and showers

Will the CA79-S fit my child and how should I measure?

This small model is tailored for children approximately 3–6 years old and fits a seal circumference between 6¾ and 7½ inches, with a cover length of 17 inches. Measure around the widest part of the upper arm where the sleeve will seal; compare to the sizing range to confirm a secure fit and avoid over-stretching the sleeve.

• Seal circumference range: 6¾–7½ inches
• Overall cover length: 17 inches
• Recommended age guide: about 3–6 years (measure to be sure)

What is the material like and is it comfortable for kids?

The cover is made from sustainable natural rubber that is soft and flexible, offering a gentle fit around the arm without rigid seams. The elasticity allows movement for typical play and swimming while maintaining a watertight seal; it’s best used for supervised, limited-duration water activities to keep comfort and safety in balance.

• Sustainable natural rubber for softness and stretch
• Flexible design supports common arm movements
• Comfortable for short to moderate water use with adult supervision

How should I use and care for the BLOCCS arm sleeve?

Before use, check that the cast or dressing is appropriately covered and dry. Slide the sleeve on smoothly to avoid overstretching, ensure the seal sits on intact skin above the cast, and rinse the sleeve with fresh water and mild soap after each use; allow it to air-dry away from direct heat or sunlight to prolong the rubber’s life.

• Inspect sleeve and cast for damage before each use
• Rinse with fresh water and mild soap after exposure to chlorine or salt
• Air-dry away from direct heat or sunlight to preserve elasticity

Who is this for? Parents and caregivers of young children with arm casts, bandages, or wound dressings who want a simple, reusable solution to keep injuries dry during swimming, bathing, or casual water play. The CA79-S model is best for smaller arms (approx. ages 3–6); if measurements fall outside the listed range, consider another size for a safe, reliable seal.