360° Baby Protector helmet:Baby helmet designed to add an extra layer of protection to the fontanelles and the back of the head while the baby is learning to crawl or walk.The three bumps on the top of the head play a cushioning role to reduce the damage to the head Adjustable and expandable:Our baby helmets 1-2 years and the head circumference of 15.7-18.9 inches. The back of the hat has elastic band to adjust the size. Please make your purchase after making sure the size is right for your baby's head Soft and Breathable:The toddler safety helmet made of PE and Polyester fabric,the fill-in layer is high density and elastic sponge，has shock resistance，which can effectively prevent infant injuries.Helmet raised on both sides, 26 vents that will keep the baby’s head cool，not stuffy Lightweight:Our baby helmet for walking crawing weights only 3.7oz,which is about the weight of an apple.And the thickness less than an inch,baby wear without any discomfort.V-shaped chin strap with widened design to increase its adhesion and usage time Easy to care:The Infant safety helmet is completely washable and will not deform when washed repeatedly. Hand wash is preferable,however it can be put into the washing machine too.If you have any problems in use, you can contact us in time.Thank you for your support of Domayllay. With this baby protection helmet, you no longer need to constantly patrol after your unsteady walking child or keep your toddler in a playpen or cot all day, and are able to give your little one the freedom to explore new discoveries.