1.Size Detail: S: Applicable head circumference 45-48cm/17.5-18.5 inches, M: Applicable head circumference 48-53cm/19-21 inches. L: Applicable head circumference 58-64cm/23-25 inches. Measure completely around your forehead at the fullest part pulling the tape measure snug. The tape should be about ½' above each ear. 2.Soft Padded Headgear: The foam padded rugby helmet is made of high quality polyester fabrics that are quite breathable and comfortable to wear. The processing is very good and the EVA foam is abrasion and dirt resistant. , soft. It's comfortable to wear. This soft helmet provides perfect protection for your ' head. 3.Super Sticky Adjustable Chin Strap: The adjustable chinstrap and elastic back rear laces ensure the proper fit. The back of football helmet have adjustable tightness, you can adjust the size of the helmet according to your head circumference. The chin fastener attaches the rugby helmet to the head and is easy to put on and take off. The high quality adjustable chin strap of this rugby helmet is resistant to tearing and has a long-lasting durability. 4.Breathable Material: This soft football helmet is made of high quality polyester fabric, excellent shock absorption and pressure relief, excellent moisture transport and sweat-releasing performance. Ventilation holes distributed on the surface allow maximum airflow and the cavity at the top allows hot air to escape.