ThermApparel UnderCool Cooling Vest 3.0 with SlimCool - BlackOther Resources: Cooling Pack Care and Storage Recommendations:When not in use always store Cooling Packs in the solid state, this means the fridge, freezer, or a room less than 70F/21CCooling packs left in their melted state for extended periods of time will result in rapid aging and reduce the lifespan of the cooling packs.When handled properly packs should last 2-3 years, and our recycling program provides deeply discounted replacement packs.To wash your cooling packs, use warm soapy water in the sink. Do not put them in the washer, dryer, or dishwasher.UnderCool Features:Adjustable straps and a velcro front for the best fit and comfortWicking fabrics and built-in mesh panels to keep you dry and comfortableCooling pack pockets along backCooling relief for 1-3 hours depending on cooling packWhen handled properly packs should last 2-3 yearsSizing Tips:Sizing is based on your natural waist, not your hips or pant size.Measure against your skin.Take your measurements in front of a mirror.Make sure your tape measure is level on both sides.UnderCool needs to fit your body like a glove to give you the best cooling support.You will wear a size smaller than you think.This Purchase Includes:1 UnderCool vest of color black1 set of cooling packs - SlimCool ThermApparel UnderCool Cooling Vest 3.0 with SlimCool - Black