Silicone 60% + Aluminum wire 40% Silicone material, smooth and anti-slip. The silicone protective case has a smooth surface for a comfortable grip; the silicone quality is soft and flexible, preventing slippage and scratches Flexible and rigid design for multiple uses. Flexible: Easily twist into any shape by hand; Rigid: Holds shape under tension for hanging and tying items Shapeable and easy to manipulate. Made with a suitable hardness wire and silicone, it can be twisted, rotated, joined, wrapped, and fixed with ease and fun Hangable and tieable, versatile and convenient. They can open and close securely, not easily falling off. Versatile for use anywhere Durable and waterproof, reusable. With a durable, bendable wire inside, it maintains its shape. The silicone outer layer is moisture-proof, rust-proof, and heat-resistant, reusable indoors and outdoors This is one of those little things that can have a significant impact on your life!