Klim Nac Pak Backpack The proven Nac Pak is redesigned for long trips and features improved ergonomics so you can ride longer. Thanks to the ideal combination of load capacity containers for transporting accessories quick access and smart tool storage, Nac Pak is the one who bag lovers still rely on. In the updated Nac Pak backpack you can take with you everything you need for a whole day in the fresh air, or even a textbook and a small laptop for studying. Features: Medium-sized backpack for strength sports Removable, water-resistant tool kit External shovel and sample storage Large enough for small/medium sized laptops Reflective 3m Scotchlite New racing style shoulder straps integrated into sternum and side straps (no waist strap) Back panel is molded and ventilated Special zipper pullers glove-friendly Chamois for glasses in molded glasses pocket Compression straps Emergency whistle Durable nylon construction Internal organizer with key clip Horizontal attachment for tool bag Compatible with Hydrapak 3 liter (sold separately) Heavy duty YKK zippers