AIRLOCK ROLL TOP BACKPACK 2.0 32L LOAC 2.0 32L Large Octo Airlock Cylinder A. SPLASHPROOF (NO SCUBA)Octopus Disaster ResistantTM bags and packs are made with waterproof coated textiles and have welded/sealed YKK zippers to safeguard your supplies. B. MEGA DURABILITYOur Disaster ResistantTM bags and packs use 8 stitches per inch of high-quality ballistic nylon thread for added overall durability and longevity. C. SEALED COMPARTMENTSEach bag and pack has sealed compartments and pockets to protect your gear from catastrophe. The MNAP 20L and VLAP 34L contain sealed laptop compartments fitting up to 1 Disaster Resistant Waterproof Airtight Roll Top With Side Fastening Packdown System Mega Durable Waterproof Coated Textile Ergonomic Support System Welded / Sealed Front Stash Pocket Welded / Sealed YKK Zips