Hybrid Construction – Combining tough, durable foam with Atlas’ hi-impact polymer allows for better impact force distribution specifically designed for low level impacts. Jr Easy Open system allows for quick, repeatable entry and exit with a simple push button on front. Low Level Impacts – Tough foam front construction is perfect for low level impacts that young children experience, and provides excellent comfort during use. Colored Padding – Vibrant padding colors are a perfect fit for any personality. Spine Free – Dual folding back supports increase contact with the body, and avoid your spine by sitting on the surrounding muscles. Soft Sternum – Durable foam padding provides a cushioned force absorption system to protect your child from blunt helmet impacts and over extension of the neck. Chest Strap – A simple chest strap system is included to help fasten the Broll to your body. Weightless design – 290g (0.64 lbs.). The most amazing thing about wearing it is that you forget you’re wearing it. Surface Area – By sitting on more of the body than the competition, comfort is maximized, and forces are distributed more efficiently over the body. Easy to clean & dry, doesn’t hold water. On the fly strap adjustment. Sizing Recommendations: (Sizing is based on chest circumference - distance around the chest, measured high on the chest, just under the arms). One Size.............. 21" - 25" Chest