REI Lightweight Stuff Sack vs Sea to Summit Ultra-Sil Sack 4L
Weight and specs compared for 2026 — and which one to choose.
Budget-friendly ultralight stuff sack for pack organization. Only 0.7 oz.
Full details →Ultralight stuff sack for food, clothing or sleeping bag.
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REI Lightweight Stuff Sack vs Sea to Summit Ultra-Sil Sack 4L: which should you buy?
If saving weight is your priority, the REI Lightweight Stuff Sack wins — at 20 g it is 4 g (17%) lighter than the Sea to Summit Ultra-Sil Sack 4L (24 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.