●Adjustable: use the rear adjuster and straps to get the perfect fit. Available in size S (48-52 cm, 2-6 years) and size M (52-56 cm, 6-10 years). The age is indicative, it is recommended to measure the head. ●Quality: The Sawyer Bikes helmet is not only lightweight, but is also made with high-quality materials and in-mould technology. ●Breathable: this helmet is equipped with 17 ventilation holes that allow air to circulate and prevent sweat on the head. ●Variety: available in 8 colours to combine with your bike, scooter, skateboard, skates or other products. ●SATISFACTION GUARANTEE We solve any doubt or problem almost immediately.