Keep your head cool and safe with the Fuse bicycle helmet. The materials are bonded, making the helmet feel very light. The mesh inner lining allows air to pass through while the ergonomic design does not add resistance. The helmet is easily adjustable with a dial. Specifications: Model: Fuse Color: matte black, white Gender: unisex Material outer shell: plastic Material middle shell: foam Inner shell material: mesh Ventilation: 24 vents Size: L