The back panel has PALS compatible mounts. You can slip your backpack's side compression straps under the front mounted webbing. This 6 liter model suits packs above 60 liters in volume. The PALS mounts leave a 9 cm wide corridor between the pocket and your pack, enabling carrying a hatchet, fishing poles etc. - Main fabric: 500 denier Cordura, 100% polyamide - Liner: 210 denier polyamide - 25 mm wide polyester webbing - Simple inner pocket - Zipper with flap - Inner D ring for clipping small items to - Flat inner pocket at the rear - Bottom and sides are reinforced with a liner fabric - PALS compatible - Grommet and hole at the bottom for draining - 5 year guarantee against flaws in materials and manufacturing Alternative packing examples of use by the manufacturer: - Hammock and underquilt - Light puffer jacket and pants or rainwear - Two regular 1.5 liter bottles - Jetboil stove, gas cartridge, water and food - At least 24 hours worth of food and snacks