Easy to use,with magic buckle connection Very low weight Unicase technology ,more safe and perfect Gender: Men, Women, Teenager Size:M: 55-58CM, L: 58-61CM Material: Outside: PC,inside:EPS,PU foam,nylon adjust belt Unicase technology ,more safe and perfect Storage advice: Do not stored in damp environment, near where the heat source or directly in light, helmet for dry processing, suggest using canvas package for storage. Impact protection: Very low weight, about 260g Ventilation,use air cooling make the air free Anatomic design , senior double-sided velvet protection pad Easy to use,with magic buckle connection Brand MOON SKU MO477SP0FS3E0NAFAMZ-73417