Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs)
When gear needs to get lighter and smaller, pack it into the Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs). Built from 30D diamond ripstop siliconized Cordura®, it weighs just 2.4 oz and squeezes a 6 liter load down to about 2 liters using four evenly spaced compression straps. The "Flip-Top-Lid" design keeps those straps from tangling every time you open the sack.
Features
- "Flip-Top-Lid" design prevents strap tangling
- 30D diamond ripstop siliconized Cordura®
- Four straps for even compression with no bulging
- Extra-long straps so the sack can genuinely be filled to capacity
- Bar-tack reinforced stress points
- Webbing pull handle on the bottom
- Slippery finish for easy packing and extraction
- Supplied in assorted colors
Specifications
| Model |
Ultra-Sil Compression Sack – XS (Extra Small) |
| SKU |
stsultrasilcompsackxs |
| Size |
5.5" x 14" |
| Weight |
2.4 oz |
| Volume (max / compressed) |
6 L / 2 L |
| Fabric |
30D diamond ripstop siliconized Cordura® |
| Compression |
4 straps with flip-top lid |
| Reinforcement |
Bar-tacked stress points |
Frequently Asked Questions
How much does the Sea to Summit Ultra-Sil Compression Sack XS compress?
The Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs) takes a 6 liter load down to roughly 2 liters — about a two-thirds reduction — once all four straps are cinched. It measures 5.5" x 14" uncompressed.
What is the difference between the Ultra-Sil and standard Sea to Summit Compression Sack?
Fabric and weight. The Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs) uses 30D diamond ripstop siliconized Cordura® and weighs 2.4 oz, while the standard Compression Sack line uses heavier 210D PU-coated nylon. Both use the same four-strap flip-top-lid compression system.
Is the Sea to Summit Ultra-Sil Compression Sack XS waterproof?
No. The Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs) is a compression sack, not a dry sack — the siliconized fabric sheds light moisture but the seams are not taped and the closure is not a watertight roll top. If you need waterproof storage, look at the Sea to Summit eVent or Ultra-Sil Dry Sack range.
What does the Flip-Top-Lid do on the Sea to Summit Ultra-Sil Compression Sack XS?
On a conventional compression sack the four straps cross the opening and tangle every time you unpack. The Flip-Top-Lid on the Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs) keeps the straps anchored to a hinged lid instead, so the mouth opens clean and the straps stay in order.
What should you pack in the Sea to Summit Ultra-Sil Compression Sack XS?
At 6 liters the Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs) is sized for a down vest, a light insulation layer, a summer quilt liner or a compact clothing kit. Lofty, compressible items gain the most; hard or sharp gear is better carried elsewhere.
Where can I buy the Sea to Summit Ultra-Sil Compression Sack XS?
You can buy the Sea to Summit Ultra-Sil Compression Sack XS (stsultrasilcompsackxs) at Going Gear, an authorized Sea to Summit dealer. Every sack ships new in original packaging with the full manufacturer warranty.
