●(Safety Protective Helmet) The interior is filled with highly elastic sponge of the orthopedic body, which can protect the head when the head is crashed ●Comfortable to Wear: The top is made with a hollow and breathable design that weighs only 4.2 oz (120 g), and is extremely lightweight, and the head is not heavy on the head. The interior is equipped with a soft sponge that has high elasticity so it is suitable for long periods of time and easy to use ●Adjustable Size: The dimensions can be adjusted using the Velcro tape, and is suitable for head sizes 50 to 65, suitable for youth and adults ●(Safe Material) Made of 100% cotton material, it is sweat-absorbent and breathable, making it very comfortable to wear and suitable for long periods of time ●Washing Instructions: Hand wash only, do not machine wash ●This product is designed to reduce impact force and reduce head damage when you hit the head. No guarantee that the user is harmless