Zpacks Women's Arc Haul Ultra 70L Backpack

The Zpacks Arc Haul Ultra 70L is a women's-specific thru-hiking backpack weighing 608 g, giving a ratio of roughly 8.7 g per litre — light even by ultralight standards for a pack this size. The body is built from Ultra 100X fabric and carried on a carbon-fibre Arc Frame, an external arc that holds the back panel off your spine for airflow and transfers load to a padded hip belt rather than the shoulders alone. Back length is adjustable, so the fit isn't locked to one torso size within the women's-specific cut. At 70 litres this is the largest of the three Arc Haul Ultra volumes, sized for longer thru-hikes, bear-canister sections, or cold-weather trips where bulkier gear and more food need to fit rather than compress. It's built around a thru-hiking, ultralight approach: hikers running a low base weight who want a durable Dyneema-based fabric and a real load-carrying frame, not a frameless roll-top. Anyone needing a men's-cut or a smaller daypack-style volume should look elsewhere in the range.