Specifications: Material : cotton and sponge Weight: 75g Size : 40*53cm/15.7*20.9 inches Features: √baby safety helmet for 0~4 years old (6-48 months);suitable for head circumference of 43cm to 53cm, baby who learning to crawl, walk and run. √The protective hat is made of breathable cotton and sponge inner which can effective reduce the impact force when hit,very comfortable to wear, non-toxic and safe. √360 Degrees full protection toddlers' head, mitigate damage to baby head when infant head collided, reduce shock, protect baby brain healthy and keep infant head away hurt. √Specially hollowed-out design ensure baby not hot when wear, make the hat more breathable and comfortable wear,suitable for any weather, such as spring, summer, autumn ,Winter. √Adjustable chin strap ensures hat stay-on when windy or kid pulls.Soft and lightweight make it foldable & packabel for travel. Please Note: 1.This baby head protective hat toddler safety helmet can't be used as professional baby safety helmet when riding on a bicycle, electric bike and motor bicycle. 24.Even wear this soft baby protective hat,baby also need to be cared by adult. 3.Please allow 1-2cm differences due to manual measurement. 4.Due to the light and screen difference, the item's color may be slightly different from the pictures. Package includes 1 x baby safety helmet