Adjustable shoulder strap with buckle. Chin pad and easy click on attach / trigger loop. 11 ventilation holes, breathable. Adjustable mini ratchet on the back of the helmet for a perfect fit. Built for ear protection. Internal foam molded waterproof. Suitable for kayaking, canoeing, paddleboarding, boating, surfing or other water sports. Material: ABS Size L, Fit for 21.65 to 24 inches / 55-61 cm circumference of the head Color: Red Package Contents: 3 x Kayak Helmet Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.