The 3 to 7 day Altra 75 LT features the unique Load Transfer Disc™, which increases agility and stability on any terrain. Arc’teryx specific C2 (Composite Construction) Gridlock™ shoulder straps adjust for custom fit, reducing load movement and backward pull. Space efficient compartments keep you organized, one-handed closures make it a breeze to find what you’re looking for and Wingman™ side pockets are easily accessible without taking off the pack. As with all the large capacity Altra packs, the Altra 75 also features an extendable top lid for added capacity and is hydration bladder compatible. The 210D nylon 6.6 ripstop fabric construction is coated with silicone to shed moisture and provide additional waterproofing while resisting dirt, snow and water saturation.