Aarn Featherlite Freedom Pack (Medium) vs Outdoor Vitals CS40 Ultra Backpack
Weight and specs compared for 2026 — and which one to choose.
Revolutionary body-worn backpack distributing load directly to hips and core. Adjustable for optimal comfort. Medium size rated for multi-day trips with natural...
Full details →40L ultralight backpack with carbon fiber frame stays. Weighs 27oz and supports up to 35 lbs with full functionality.
Full details →HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.
Aarn Featherlite Freedom Pack (Medium) vs Outdoor Vitals CS40 Ultra Backpack: which should you buy?
If saving weight is your priority, the Outdoor Vitals CS40 Ultra Backpack wins — at 765 g it is 787 g (51%) lighter than the Aarn Featherlite Freedom Pack (Medium) (1,552 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.