Mammut Aenergy Trail Endurance Ultra vs On Running Cloudultra 2
Weight and specs compared for 2026 — and which one to choose.
Lightweight trail running shoe designed for mid-to-long distance runs and hiking. Features Vibram Megagrip outsole and FLEXTRON PRO plate for technical terrain.
Full details →Ultra trail shoe with CloudTec cushioning for long distances.
Full details →HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.
Mammut Aenergy Trail Endurance Ultra vs On Running Cloudultra 2: which should you buy?
If saving weight is your priority, the Mammut Aenergy Trail Endurance Ultra wins — at 320 g it is 300 g (48%) lighter than the On Running Cloudultra 2 (620 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 footwear page, or browse the full gear weight database.