HB-107 12 Ventilation Channels for Cooling Comfort Lightweight High Strength Polypropylene Straps Quick Release Buckles Snell B-95A Certified CE and CPSC Standards Size :S/M,L/XL CM :56~60cm,60~64cm INCHES:22~23.5,23.5~25 Color :Black Blue Green Purple Red White Yellow Vent :12