Klim Nac Pak Hydrapak Backpack The Nac Pak Hydrapak Bag from Klim is an ideal choice for those extended day trips or unexpected overnight adventures. It offers the convenience of carrying both your small to medium-sized laptop and various tools, making it a versatile accessory for the outdoors. The bag includes a 3L Hydrapak bladder, designed for easy maintenance and the option to freeze, ensuring that you have access to cool water during your excursions. Built to balance cargo and accessory capacity with easy access and smart tool storage, the Nac Pak 3L Hydrapak positions itself as a dependable bag for any journey. Nac Pak Features: Removable water-resistant tool pak External shovel and probe storage Large enough for small/medium sized laptops 3M Scotchlite reflective material Race-inspired shoulder straps integrates into sternum and side straps (no hip belt) Back panel is molded and vented Custom glove friendly zipper pullers Goggle chamois in molded goggle pocket Compression straps Emergency whistle Heavy duty nylon construction Internal organizer panel with key attachment clip Horizontal tool bag attachment Hydrapak 3 liter bladder included YKK heavy duty zippers Hydrapak Bladder Features: Capacity: 3 liters Slide-seal top opens wide for easy filling and closes tight for a leakproof seal High-flow blaster bite valve self seals after each sip Twist on/off bar on bite valve prevents leaks when not in use Plug-n-play system connect lets you easily disconnect the drink tube and remove the reservoir from your pack for convenient refilling Auto-shutoff valve prevents leaking when disconnecting drink tube Fully reversible for easy cleaning and drying Top-shelf dishwasher safe Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity Can be frozen or filled with hot water (Max temp 140F) Safe and reliable, 100 BPA and PVC free