Women's Arc Haul Ultra Sizes: 50L, 60L or 70L?
By Zpacks | Level Up Your Next Adventure | Published: 2026-10-31
Category: Buying Guides
Use trip length, food carry, and your existing gear volume to choose between the Women's Arc Haul Ultra 50L, 60L, and 70L. A practical decision guide with fit notes.
Quick answer
Choose the 50L for 2–4 night trips with compact gear, the 60L for 4–7 nights or a bulkier sleep system, and the 70L for long food carries or winter gear. All three share the same women's-specific Arc Haul Ultra design and Ultra 100X fabric; volume is the main difference.
What actually changes between 50L, 60L, and 70L
The three Women's Arc Haul Ultra packs differ primarily in internal volume. The 50L, 60L, and 70L all use Ultra 100X fabric and the same women's-specific design, so the decision comes down to how much space your gear and food require, not a change in frame style or fabric durability.
That means you are not choosing a heavier-duty pack at 70L or a lighter-duty pack at 50L. You are choosing how much room you have for a quilt, pad, shelter, clothing, and food. The right volume is the one that carries your longest realistic load without leaving large empty spaces that make packing unstable.
Why a 50L can be the right call for short trips
A 50L pack rewards a dialed-in ultralight kit. If your shelter, quilt, pad, and clothing compress into a small bundle, the 50L keeps the load close to your back and discourages overpacking. For 2–4 night trips with resupply every few days, it is often enough.
The trade-off is food. A 50L leaves less room for a long carry, so it suits trips where you can resupply frequently or carry compact, calorie-dense food. If you routinely carry a bear canister or a bulky synthetic quilt, the 50L may force you to strap gear outside the pack.
Where the 60L earns its place
The 60L is the middle ground for hikers who want one pack to cover most three-season trips. It gives you extra room for a slightly bulkier sleep system, a few extra layers, or a 5–7 day food carry without stepping up to the largest size.
If you are unsure between 50L and 60L, measure your current gear volume rather than guessing. Pack your gear into a box or duffel and compare its volume to the pack's listed capacity. The 60L is the safer choice when your kit is not yet fully compact or when trip lengths vary widely.
When the 70L is worth the extra volume
The 70L makes sense for long food carries, winter trips with bulky insulation, or trips where you must carry gear for another person. It also helps if you use a framed pack as a base camp pack and want room for comfort items.
The trade-off is that a 70L can encourage overpacking. If your three-season kit already fits in a 50L, the 70L may feel unnecessarily large and less stable when partially loaded. Choose it only when your gear list or food carry genuinely requires the space.
Decision rules for choosing your size
- Trip length 2–4 nights: Start with the 50L if your sleep system and clothing are compact and you can resupply every few days. If you regularly carry a bear canister or bulky synthetic quilt, move up to the 60L.
- Trip length 4–7 nights: Choose the 60L for a balance of food capacity and packable size on three-season trips. Measure your current gear volume first; if it already exceeds 50L, the 60L is the safer fit.
- Long food carries or winter gear: Choose the 70L when you need to carry more than a week of food or bulky insulation. If your three-season kit fits in a 50L, the 70L will likely be more space than you need.
- Unsure between two sizes: Pack your gear into a box, measure its volume, and compare it to the listed capacity. Leave room for food and water. When still in doubt, size up only if your longest trip requires it; otherwise stay with the smaller pack for better load stability.
Product facts
- Women's Arc Haul Ultra 60L Backpack: Women's Arc Haul Ultra 60L is made with Ultra 100X fabric and designed with women in mind. The durable fabric and women's-specific design make the 60L a versatile choice for thru-hikes and multi-day trips where volume needs vary.
Women's Arc Haul Ultra 60L Backpack - Women's Arc Haul Ultra 70L Backpack: Women's Arc Haul Ultra 70L offers the largest volume in the women's Arc Haul Ultra line. The extra capacity suits long food carries or bulky winter gear, but it is more pack than most three-season hikers need.
Women's Arc Haul Ultra 70L Backpack - Women's Arc Haul Ultra 50L Backpack: Women's Arc Haul Ultra 50L is the smallest volume in the women's Arc Haul Ultra line. It keeps short-trip loads compact and discourages overpacking, provided your gear and food fit within 50 liters.
Who each size suits
Best for
- Section hikers and weekend backpackers with compact ultralight gear (50L)
- Thru-hikers and week-long trippers who want one versatile pack (60L)
- Hikers with long food carries, winter trips, or bulky gear (70L)
Not for
- Hikers who routinely carry bulky gear or a bear canister on short trips (50L may be too small)
- Ultralight purists whose gear already fits in 50L and who want the smallest possible pack (70L is unnecessary)
- Anyone who has not measured their gear volume and is guessing between sizes (measure first)
