Head protective hat designed to match a variety of outfits. Can be used not only for going out, but also for indoor use. The inside of the hat is equipped with a shock absorbing pad in case of a fall, making it more secure and fashionable. A hat with a built-in shock absorbing pad that can be worn outdoors or in a room or hospital room. The knit material is soft to the touch, so you can relax and wear it in the room or inside. The lining is made of mesh material for improved breathability. Available in 4 colors. Includes chin strap. Make sure it fits your head. Secure chin strap to ensure it stays in place before use. Please refrain from cutting, sewing, or other modifications as it may deteriorate its functionality and cause an accident. Size: Head Circumference: S: 20.9 - 21.7 inches (53 - 55 cm), M: 21.7 - 22.4 inches (55 - 57 cm), Weight: Approx. 3.9 oz (110 g), Material: Outer Material: 100% cotton, Lining: 100% polyester, Shock Absorbing Material: Styrene elastomer, Accessories: Chin Strap, Hand washable.