Children's helmet, size S/M (51-55cm). A strong ABS shell in fashionable colors with an impact-absorbing EPS liner provides children with maximum head protection. Comfortable kids' helmet with 7mm comfort pads, 2mm soft chin pad, and vents for extra safety and comfort. Adjustable helmet with straps and an easy-to-use buckle. Easily adjust the fit with the rear dial. The lithium battery-powered LED taillights provide high visibility and have 3 lighting modes (on, flashing, fast flashing). The ULTIMUM helmet is designed to keep your child safe and protected on all their wheeled adventures. With a durable ABS outer shell and EPS foam lining, this helmet provides maximum impact absorption. The ULTIMUM helmet's rear LED module features 6 lights and 3 modes, providing extra visibility for your child. The ULTIMUM kids' helmet features 7mm foam pads for a snug fit and added protection. A soft chin pad prevents irritation or discomfort during use. The ULTIMUM helmet's integrated vents also keep your child's head cool, providing additional ventilation. The ULTIMUM kids' helmet is adjustable and features a rear size adjuster and a chin strap that can be easily adjusted to ensure the best and most secure fit. Let your little one ride confidently in a helmet that's safe and comfortable!.