NOTICE? 1, Please ensure all articles are clean and totally dry when vacuum them and have a long term storage. 2, Please do not packing down jacket and duvet, Structure of the feather would be damaged in vacuum and the warmth would be much lower next time. 3, Please do not bending or creasing the zipper to prevent breakage, Zipper would lose its function if it is folded for a long time. 4, Please do not store near sharp objects, heat sources or in temperatures over 150?. How to use: packing: 1, Packing neatly folded clothing, pillow and quit into bag. Sealing 2: Close the bag and sliding zipper 2-3 times across the bag. Vacuum 3, Pumping all the air out with home vacuum cleaner, electric air pump or Bonus travel pump. Seal Tight 4, cover the triple-seal turbo valve immediately once all air has been extracted, and have a double check if completely sealed, repeat steps above if leaking. Description? 5 layers Co-extrusion film Made of high quality PA +PE, A good choice for classification preservation and long term storage. Double Seal Zipper Asymmetric design creates a secure seal and make a better protection of the Achilles heel. Triple-Seal Turbo Valve anti-reflux groove with upgraded gasket make a great performance in seal. There is also a cap each valve to impact the gasket.