HB-103 10 Ventilation Channels for Cooling Comfort Lightweight High Strength Polypropylene Straps Quick Release Buckles Snell B-95 Certified CE and CPSC Standards Size: S/M L/XL CM :56~60cm 60~64cm INCHE:22~23.5 23.5~25 Vent :10 Color :Black Blue Green Purple Red White Yellow