The Lem MavVac Vacuum seal roll material is designed to achieve the professional results master chefs demand. Our innovative parallel channel design prevents hidden air pockets while the sturdy 3.5 mil puncture resistant plastic makes these bags ideal for the big jobs. Roll material allows you to customize bag size to perfectly fit the food you are sealing reducing bag waste and saving you money. Bags and bag roll material are reusable and include a space to label the date/contents. All bags and bag roll material are compatible with most major vacuum sealer brands. Great for Sous Vide cooking or keep your valuables dry. These bags are up to the task - and all at a price that makes sense! Engineered to achieve optimal results with all Lem MaxVac heat seal bar vacuum sealers and most national brand sealers.