Product: Bicycle helmet with glasses Gender: Men, Women Size: L: 57-61CM Color: Black 2. Material: Outside: PC,Inside:EPS Unicase technology ,more safe and perfect 3. 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. 4. Impact protection: Very low weight, about 235g Ventilation,use air cooling make the air free Anatomic design , senior double-sided velvet protection pad Easy to use,with magic buckle connection ​Package : 1pcs * bike helmet