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REI Lightweight Stuff Sack vs Sea to Summit Ultra-Sil Daypack 20L

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

REI Lightweight Stuff Sack is the lighter option — 48 g lighter than the Sea to Summit Ultra-Sil Daypack 20L (71% less weight). If grams matter to you, that is the one to beat.
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Spec REI Lightweight Stuff Sack Sea to Summit Ultra-Sil Daypack 20L
Weight 20 g · 0.020 kg · 0.04 lb 68 g · 0.068 kg · 0.15 lb
Brand REI Sea to Summit
Category Miscellaneous Miscellaneous
REI Lightweight Stuff Sack
20 g

Budget-friendly ultralight stuff sack for pack organization. Only 0.7 oz.

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Sea to Summit Ultra-Sil Daypack 20L
68 g

Ultralight packable daypack. Stuffs into its own pouch.

Full details →

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REI Lightweight Stuff Sack vs Sea to Summit Ultra-Sil Daypack 20L: which should you buy?

If saving weight is your priority, the REI Lightweight Stuff Sack wins — at 20 g it is 48 g (71%) lighter than the Sea to Summit Ultra-Sil Daypack 20L (68 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.

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