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Darn Tough Micro Crew Lightweight vs On Running Cloudultra 3

Weight and specs compared for 2026 — and which one to choose.

Darn Tough Micro Crew Lightweight is the lighter option — 195 g lighter than the On Running Cloudultra 3 (66% less weight). If grams matter to you, that is the one to beat.
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Spec Darn Tough Micro Crew Lightweight On Running Cloudultra 3
Weight 100 g · 0.100 kg · 0.22 lb 295 g · 0.295 kg · 0.65 lb
Brand Darn Tough On Running
Category Footwear Footwear
Darn Tough Micro Crew Lightweight
100 g

Lightweight merino wool socks for trail running. Per pair.

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On Running Cloudultra 3
295 g

Trail running shoe at 10.4 oz per shoe for hiking, updated 2026 model with enhanced stability

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Darn Tough Micro Crew Lightweight vs On Running Cloudultra 3: which should you buy?

If saving weight is your priority, the Darn Tough Micro Crew Lightweight wins — at 100 g it is 195 g (66%) lighter than the On Running Cloudultra 3 (295 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.

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