Limar 149 children's cycling helmet protects your child's head while riding. The rear of the Limar 149 helmet is ergonomically designed to rest against the highback of the child bike carrier or trailer so the helmet stays in place. The adjustable sizing system allows you to adjust the helmet so it properly fits your kid's head. The ventilation ports feature an internal bug net to keep unwanted pests from entering the helmet. Your child will love wearing this helmet on and off the bike!.