Made from sustainable recycled polyester. Secure, lightweight, and comfortable swim diaper encourages swimming. Easy on-and-off elastic waist. UPF 50+ Sun protection blocks 97.5%-99+% of UV rays. Our reusable swim diaper is trusted by over 200 national swim schools and private swim instructors for secure protection. Certified STANDARD 100 by OEKO-TEX and independently tested against a list of over 350 harmful substances.