Durston Gear Kakwa 55 vs Hyperlite Mountain Gear Windrider 40
Weight and specs compared for 2026 — and which one to choose.
Versatile 55L lightweight pack in UltraGrid fabric with aluminum frame stays. Excellent load transfer for heavier loads up to 40 lbs.
Check price Full details →100% waterproof Dyneema pack with sewn-through back panel and internal frame stay. 40L volume, three exterior mesh pockets for wet gear.
Check price Full details →Durston Gear Kakwa 55 vs Hyperlite Mountain Gear Windrider 40: which should you buy?
If saving weight is your priority, the Durston Gear Kakwa 55 wins — at 839 g it is 5 g (1%) lighter than the Hyperlite Mountain Gear Windrider 40 (844 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.