Data Adjustable visor ABS coating 15 Ventilation holes Structure: outer glass fibre shell Weight: 850 grams BELL helmet Dedicated to BMX fans, the full face BELL SANCTION helmet is a comfortable protection of the whole face while exercising your favorite sports activity. The outer shell of glass fibre is a guarantee of adequate durability during falls. A helmet with full mandible cover and extended back and fully adjustable visor covers delicate parts of the face. The interior of the helmet fits well to the shape of the head and cheeks. 15 vents provide proper air flow inside the helmet and cools the head while driving. Robust workmanship and modern materials from which the helmet has been made guarantee its durability and resistance to mechanical damage.