Ultra-Sil Day PackSale
MATERIAL(S): Lightweight ultra-sil fabric for strength, durability & water resistance
CAPACITY: 20 liters
DIMENSIONS: 11 x 8 x 19 inches
WEIGHT: 2.5 oz | 72g
Shipping & Returns
Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.
2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).
All orders are eligible for fast and easy returns within 60 days of purchase.
For more details, please check out our Help Center
Our award-winning Ultra-Sil Day Pack is a minimalist backpack that has incredible strength-to-weight performance and packs down to the size of a tennis ball. The 30D siliconised CORDURA® fabric and reinforcing bar-tacks at stress points enable it to withstand loads many times its own weight.
With a 20L capacity, it's perfect for a summit pack, carrying groceries when on foot or on a bike, or as an extra traveling tote. The tiny packed size also easily fits onto your key ring, in a jacket pocket or a purse.
With non-padded shoulder straps, our maximum load limit recommendation for a comfortable carry is 15 lbs / 7 Kg.
- Ultra-Sil 30D siliconized CORDURA® fabric for strength and durability
- Reinforced shoulder straps for increased carrying comfort
- Packs into an attached stuff sack that includes a handy carabiner
- Packs down small so it easily fits in pockets, purses or luggage
- Perfect as a lightweight backup or travel bag
Cordura® is a special type of nylon yarn used for its strength. These yarns are used in two different product areas:
- In the siliconized Ultra-Sil™ fabrics used in Ultra-Sil™ Dry Sacks, Stuff Sacks, Compression Sacks, Pack Covers, Travelling Light and Travel Essentials products
- In the foot section of the extremely tough eVent® Quagmire Gaiters.
Best UseSummit Pack, Groceries, Travel
FabricSiliconized Cordura fabric for strength and durability
SpecialAttachment point for a bike light
WaterproofWater resistant – please see FAQs above
Zip OptionsTwo-way zipper closure
Frequently Asked questions
Is it durable?
With correct care, this pack can last many seasons. Just limit contact with sharp objects or abrasive surfaces as much as possible, since these can damage the fabric.
Is it waterproof?
No. It's only water-resistant. Even though the pack is made with waterproof material, water can enter through the seams (which are not sealed) and zipper. A few minutes of light rain is okay, but getting stuck in a downpour would likely result in the contents of the pack getting wet.
What are the differences between the Ultra-Sil and Ultra-Sil Nano day packs?
The Ultra-Sil Day Pack is made from 30D Ultra-Sil Cordura nylon and includes adjustable shoulder straps and a daisy-chain webbing loop. It has a two-way zipper closure with a generous opening and weighs 2.5oz/ 72g.
The Ultra-Sil Nano Day Pack is more compact (packing down to the size of an egg) and made from 15D. It weighs 1oz/ 30g. With an asymmetrical zipper, lightweight fabric, and slightly smaller capacity (18L vs 20L), the Nano is a great option for those that need to save on weight and space.