Deep necklines and extra-large armholes facilitate mobility for a demand and active lifestyle. UV resistant and ITW Delrin side release buckles. Child Nylon Life Vest with Open Sides has three adjustable belts with squeeze-style" side-release buckles for custom fit, use lightweight EPE Foam for floatation, and fits childern weighing in between 30 to 50 lbs. (13.6 to 22.7 kg). Most importantly they are United States Coast Guard (USCG) Approved Type III.