Integrated design. The material is polyester and high density foam.<br><p>Suitable for Rugby,Soccer,Goalkeeper,Flag Football, 7 on 7 Passing Leagues,or when children are playing .<br><p>Soft shelled helmet design with velcro strap for easy use. Added vent holes for breath-ability .Professional stitching ensures the durability of the helmet. Adjustable chin strap and rear laces insure proper fit.<br><p> Youth and Adult Sizes,Measure completely around your forehead at the fullest part pulling the tape measure snug. The tape should be about ½” above each ear. ：<br>S= 17.5-18.5 inches (45- 48cm), suitable for aged 2-4; <br>M= 18.5-21 inches (48-54 cm),suitable for aged 5-12;<br> L=21-23 inches (54-58cm) Suitable for people over the age of 12.