Premium mens slimming vest: sweat and burn fat on your upper body for the ultimate abs burner. lose fat fast: our slimming vest for men burns extra calories when you workout for optimal fat loss. curve tech comfort: 100% neoprene conforms to your waist and doesn’t pinch or irritate your skin. wear anywhere: wear your slimming body vest under or over your clothes at home or the gym. sizes varies from small, medium, large, extra large, 2xl,3xl, 4xl.