Our classic backpack is the industry standard for smell proof backpacks. This high-volume bag features a multi-layer activated carbon lining AND a separate carbon lined insert for the maximum in odor proof protection. With rubber zippers, discreet branding, exterior water bottle pockets, and ultra durable water resistant fabric, this bag is a must for your odor concealing needs. Backpack includes a separate insert. Both bags are Smell Proof. Premier Quality Activated Carbon Lining Antimicrobial Lining to Protect Carbon Heavy Duty, Conscientious* Construction H2O-Guard Zipper for Smell Proof 100 Protection™ Water Resistant Exterior Discreet: No Logo Back Support Cushion for Added Comfort Padded and Contoured Shoulder Straps Padded Laptop Compartment Quick Grab Handle Industrial Velcro Lockable Odorless K9 Tested Stash Bag