Sea to Summit Ultra-Sil Sack 4L vs Zpacks Vertice Mitts
Weight and specs compared for 2026 — and which one to choose.
Ultralight stuff sack for food, clothing or sleeping bag.
Full details →Waterproof hyper-breathable mitts with Zpacks' proprietary Vertice fabric. Only 1 oz with full seam-taping.
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Sea to Summit Ultra-Sil Sack 4L vs Zpacks Vertice Mitts: which should you buy?
If saving weight is your priority, the Sea to Summit Ultra-Sil Sack 4L wins — at 24 g it is 4 g (14%) lighter than the Zpacks Vertice Mitts (28 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 miscellaneous page, or browse the full gear weight database.