The Arc'teryx Maia 75 Women's Backpack has enough cargo capacity for a week on the trail, support to keep you comfortable, and completely waterproof construction to keep gear dry. This roll-top pack uses waterproof 420ACT fabric with fully taped seams to ensure not a single drop of moisture gets on your gear when the rain pours. Adjustable shoulder straps and a pivoting waist-belt help support weight along with the dual 7075 aluminum stays. Arc'teryx gave the Maia 75 Backpack a sealable hose port and hydration sleeve for your water bladder. Load the 4576cu inch (medium size) main compartment, stash smaller gear in the front pocket and lid, and enjoy a week in the backcountry.