7iDP Project 23 Fiber Glass Full Face Helmet Matt Deep Space Blue/Gloss Grey S 55 - 56cmLightweight fiberglass shell 23 Large freeflow vents with internal channels for maximum cooling. Energy absorbsion and slip plane technology Crash release visor system Easy position visor, no bolts needed Quick release liner for easy washing Agion Bluesign approved antimicrobial treatment Fidlock magnetic closure Certified: CPSC Bicycle & ASTM F1952 15 (Downhill) S: 55 56cm, M: 57 58cm, L: 59 60cm, XL: 61 62cm, XXL: 63 64cm TECH SPECS Misc Matt Deep