Key Features:1、Effectively remove airEmbossed back panel with diamond air channel design for maximum oxygen removal.Non-embossed front panel for optimum clarity.2、Safe and Strong4MIL thick multi-layer B.P.A-free material makes the bags safe and strong enough for freezing, microwaving, simmeringc and Sous Vide.3、Food GradeB.P.A free, Food grade safety certification Approved, L.F.G.B approved.4、Keep Food FreshUser a vacuum sealer automatically removes all the air from the bag and then uses heat to create an airtight seal, which locks out moisture and air to protect food and maintain freshness.5、Available for wet and greasy foods:The vacuum effect of wet and greasy foods as well as good at dry foods!6、Foods can stay fresh much longer:Completely isolated foods from air,vacuum degree was promoted,so it keep foods fresh up for 7 times longer!Perfect for SOUS VIDE cooking：1、Effectively Prepares FoodSous vide allows you to precisely control your cooking temperature to achieve perfect results. You can cook sous vide in DLOPK vacuum seal bags by placing them in water at any temperature.2、Keeps food SecureBy using your DLOPK vacuum sealer, water can't permeate through the bag and mess with your food3、Sous Vide CompanionDLOPK vacuum seal bags and vacuum sealers are ideal for sous vide cooking because they remove all the air around the food, effectively ensuring that the bags will float less than ordinary zipper bags.