The adjustable kids helmet is filled with compressed sponge which is not very thick and covered with Nylex material, it provides safety with comfort for your beloved kids. Please note that it only has basic protection. The adjustable circumference of 14.5-18.5 cm is especially suitable for children from 9 to 36 months. Please Note: Measure the size carefully before purchasing to ensure the size is suitable for your kids. Unique cartoon design, with lovely animal on hat, looks very attractive after wearing it. This cute protective cap is a perfect gift for baby or family with baby. Keeping clean is important for babies and toddlers. The baby helmet is washable with water and will not deform after repeated washing. The lightweight & breathable baby safety helmet offers the ideal protection for toddlers when crawling/playing. It is an ultra-lightweight, beautiful safety baby helmet for walking, to ensure that the baby is not hot in summer (please note: this helmet is not suitable as a bicycle protective cap, it is soft, not hard).