Durston Gear Kakwa 40 vs Gossamer Gear Murmur 36 Hyperlight Backpack
Weight and specs compared for 2026 — and which one to choose.
Ultralight 40L internal-frame thru-hiking pack in Ultra 200X fabric, with a hollow aluminum U-frame and 15L of external storage.
Check price Full details →Frameless 36L hyperlight thru-hiking pack made from ALUULA Graflyte fabric, with roll-top closure and included torso pad.
Check price Full details →Durston Gear Kakwa 40 vs Gossamer Gear Murmur 36 Hyperlight Backpack: which should you buy?
If saving weight is your priority, the Gossamer Gear Murmur 36 Hyperlight Backpack wins — at 225 g it is 570 g (72%) lighter than the Durston Gear Kakwa 40 (795 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.