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Sea To Summit Ultra-Sil 20L Backpack


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Keep it on your key ring.

Sea To Summit's superlight Ultra-Sil Daypack is so compressible that it can stow in a pouch the size of a set of keys. Crafted out of Cordura, the Ultra-Sil Daypack is surprising durable and weather-resistant for how light it feels. Bartack reinforcements ensure long-lasting durability for hiking in the mountains or touring around town.
  • Ultra-Sil Cordura fabric
  • Two-way zipper access
  • Bartack reinforced stitching
  • Item #STS003Q

Ultra-Sil Cordura
20L (1220cu in)
zippered top
19 x 11 x 8in
Claimed Weight
Recommended Use
casual, travel, hiking
Manufacturer Warranty

Tech Specs

What do you think about this product?


>Rating: 5

Super lightweight

I can't believe how lightweight, but sturdy this backpack is. It is great for traveling with.

>Rating: 5

The Perfect travel day bag

I've put it through the wringer

I purchased this to use as a travel day bag traveling. I have tried multiple brands of small day packs for traveling. The smallest ones I have use wear weird when loaded with the gear needed to be out on a day’s walk. Others that carry well are not that packable it seems. This bag brings both worlds together. I have not seen a smaller packed day bag out on the market, it is the size of a large egg. I was skeptical it could carry well but with a book, camera, two liters of water, and sunscreen it carried well without complaint walking for miles in the August heat! My only complaint is that there is not an inner compartment for smaller items .

>Rating: 5

Compaction at it's best

I bought this as a little basket stuffer for a gift and the recipient was wowed at how compact it is for travel, he took it overseas in his suitcase so he can do day hikes in Europe. He was beyond excited to see that it packs to about the size of a large egg.


Are there pockets on the side for water bottles?