Kids Bike Helmets Toddler Adjustable Breathable Lightweight Durable Security Full Face Bike Helmets Easy Using with LED Light Feature: 1. Adjustable Fit: The Helmet provides a comfortable wearing experience with its soft sponge pad and adjustable knob for different head sizes (52-56cm). 2. Convertible Design: Design with 16 vents to keep air flowing to help increase speed and keep cool. 3. Durable Material: Kids bike helmets is made of PC Exterior + EPS foam. The soft sponge pad inside the helmets provides us with a new wearing experience. 4. 2-in-1 helmet for children: you can freely switch between half helmet and full helmet at any time. Disassembly and assembly in one step is very convenient. 5. Security First: The brim of children's cycling helmets can effectively block sunlight. It not only protects us, but also allows us to enjoy driving to the fullest. Specification: Material: PC+EPS For Head Size: Approx. 52-56cm / Approx. 20.47-22.05in Size:32*22*20cm/11.8*8.7*7.9in Weight: Approx. 380g/ 13.4oz Package List: 1 x Helmet 1 x Detachable Chin Strap