The inflatable vest manufactured by Mustang Survival lacks the most rudimentary quality control measures. Not only was the inflatable mechanism defective the cheap zipper containing the operating mechanism split open so it was impossible to reclose the vest.This company refused to accept a return because the vest was purchased through Amazon. Amazon refused to accept a return due to the vest contains a gas cylinder.Purchase products from Mustang Survival at the risk of death and customer indifference.