Zpacks Arc Haul Ultra 70L

Zpacks Arc Haul Ultra 70l backpack 

Introducing the ultralight Arc Haul Ultra 70L backpack, designed for long days between resupplies with ample space and durability. Made from Ultra 100X fabric — a woven Ultra High Molecular Weight Polyethylene (UHMWPE) laminated to a waterproof backing — this pack boasts extreme abrasion and tear resistance. Weighing just 618 grams, this 70 liters offers enough space for 7-10 days of food and ultralight gear. 

The Arc Haul Ultra features a custom Curved Carbon Fiber frame system that creates a gap between your back and the pack, allowing airflow to keep you cool while hiking. This ventilated, trampoline-style frame keeps the pack stiff, transferring most of the weight to your hips. The belt is directly attached to the bottom of the frame for optimal load transfer, and both the belt and shoulder straps are adjustable and interchangeable. The shoulder straps can move up or down using a patented torso adjustment mechanism, ensuring a perfect fit.

Comfort is key with padded, contoured shoulder straps and a belt featuring 3D mesh for added cushion and grip. Both have daisy chains for attaching items, and an adjustable sternum strap is included. The pack offers practical storage solutions: side pockets sized for water bottles or bladders, a large stretchy mesh center pocket for quick-access items and drying wet clothes, and side compression straps made from non-stretchy Dyneema® cord. A roll-top closure keeps water out and allows you to adjust the pack's volume as your gear load changes, and top and base straps let you lash extra items externally. Certain full-size bear canisters, such as the BearVault 500, can be placed horizontally in the Arc Haul Ultra 70L. 
Made in the USA with PFAS-free materials. Designed to carry loads up to around 18 kilograms, making it an ideal choice for those seeking a durable, ultralight backpack for their adventures.

SIZE AND VOLUME

- Load Capacity: Holds up to 18 kg (40 lbs)

- Body Dimensions: 24.1 cm x 31.8 cm x 74 cm | 9.5" x 12.5" x 29"

- Volume: 70 liters total (57 liters main body, 2.5 liters each side pocket, 8 liters center pocket)

- Frame Height: Short 43 cm, Medium 51 cm, Tall 58 cm

MATERIAL

- Ultra 100X Fabric: Weighs 112 g/m², waterproof with a >20,000 mm H₂O rating, and offers tear strength of 31.5 kg (warp) and 40.7 kg (fill). It’s highly durable and abrasion-resistant, with an "X" grid for added strength.

- Mesh: Weighs 119 g/m², used for backpack center pockets, durable against abrasion and tearing, with 4 mm hole size for breathability. 

- Lycra® Mesh: Weighs 170 g/m², 4-way stretch, used for back panels, providing flexibility and tear resistance.

- 3D Spacer Mesh: Weighs 180 g/m², 2.5 mm thick, used for shoulder straps and belts, allowing airflow, cushioning, and grip.

FEATURES

• Made from ultra-durable Ultra fabric (UHMWPE laminated to a waterproof backing), offering exceptional abrasion and tear resistance without DWR coatings or PFAS.

• Ventilated curved carbon fiber frame with removable Lycra back panel creates an air gap for cooling and prevents items from rubbing; frame keeps pack stiff for efficient weight transfer to hips.

• Adjustable, comfortable carry system with padded contoured shoulder straps and removable, interchangeable belt; features daisy chains for attaching items and an adjustable sternum strap.

• Efficient storage with side pockets for easy-access water bottles, a large stretchy mesh center pocket for quick-access items and drying clothes, and side compression straps for compressing pack volume and securing tall items.

• Weather-resistant design with roll-top closure, taped seams, and attachment points; pack can be compressed for short trips or expanded using top and base straps for extra gear.

• Some full size Bear Canisters, including the BearVault 500 will fit horizontally in the 70L pack size.

• The innovative shoulder strap system is interchangeable, allowing you to choose the perfect straps for each adventure or swap them out for different-sized hikers. Zpacks' harness-style Detachable Vest Straps are also available.

• Made in the USA; designed to carry loads up to 18 kilograms, providing necessary load transfer for comfortable carrying.