Slingshot Team Impact Vest The Slingshot impact vest is thin and comfortable, It features a front zip and single buckle closure.This vest is a competition vest and is not Coast Guard ApprovedS = 32 - 36 in. ChestM = 36 - 40 in. ChestL = 40 - 44 in. ChestXL = 44 - 48 in ChestCheck out all of the Slingshot gear in stock here.