Vest extenders in a huge variety of styles. Vest extenders have multiple purposes. Have you gained some weight but don't want to buy a new vest? Vest extenders extend the size of your vest and look cool too! Do you like to get a breeze inside your vest but don't want to leave your vest open to flap in the wind? Vest extenders keep your vest open to let the air in but it won't flop around, which is so annoying while riding.