Sea to Summit Ultra-Sil Dry Bag
A longtime favorite among backpackers, the Sea to Summit Ultra-Sil Dry Bag earned the Backpacker Editors’ Choice Award and continues to be one of the best lightweight dry bags available for trail and travel use. Built from bluesign®-approved 30D Ultra-Sil fabric with Cordura® yarns, it delivers reliable waterproof protection at an exceptionally low weight.
Designed for efficient pack organization, the semi-translucent fabric makes it easy to identify contents without unpacking everything—ideal for food, clothing, sleep systems, or electronics inside your backpack or duffle. The non-wicking Hypalon® roll-top closure and fully taped seams keep moisture out in wet conditions, while the oval base helps the bag pack efficiently and prevents it from rolling away on sloped ground.
Whether you’re organizing gear inside your pack on the PCT, bike touring through changing weather, or traveling light, the Ultra-Sil Dry Bag is a simple, proven solution that adds protection without unnecessary bulk.
Product Features
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Ultra-light and flexible bluesign®-approved 30D Ultra-Sil Cordura® nylon
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Semi-translucent fabric for quick content identification
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Waterproof construction with taped seams
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Non-wicking Hypalon® roll-top closure
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Oval base packs efficiently and prevents rolling
🏔️ Perfect for PCT Hikers
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Ultralight Pack Organization: Keeps food, clothes, and sleep systems separated without adding noticeable weight
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Weather Protection: Reliable waterproofing for Sierra snowmelt, unexpected storms, and wet resupply days
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Quick Access on Trail: Semi-translucent fabric makes it easy to find gear without emptying your pack
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Stable in Camp: Oval base prevents rolling away on uneven or sloped campsites
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Dialed Systems: Ideal for color-coding or sizing different dry bags for a clean, efficient pack setup
From rainy Washington sections to dusty Southern California starts, Ultra-Sil Dry Bags help keep your gear dry, organized, and ready—mile after mile on the PCT.
|
3 LITER |
5 LITER |
8 LITER |
13 LITER |
20 LITER |
35 LITER |
| DIMENSIONS |
6.7 x 5.5 x 8.1 in |
6.7 x 5.9 x 12.1 in |
7.5 x 6.8 x 14.5 in |
8.7 x 7.7 x 17.0 in |
10.6 x 9.3 x 18.6 in |
12.6 x 11.2 x 22.2 in |
| WEIGHT |
1.1 oz |
1.1 oz |
1.4 oz |
1.7 oz |
2 oz |
2.6 oz |
|
3 LITER |
5 LITER |
8 LITER |
13 LITER |
20 LITER |
35 LITER |
| DIMENSIONS |
20.7 x 17.1 x 14 cm |
17.1 x 15 x 30.8 cm |
19.1 x 17.2 x 36.8 cm |
22 x 19.6 x 43.3 cm |
26.9 x 23.6 x 47.3 cm |
32.1 x 28.5 x 56.5 cm |
| WEIGHT |
30 g |
32 g |
39 g |
47 g |
58 g |
74 g |
