Shopping cart

close
  • No products in the cart.
Free Shipping on $50 or more. Order by 12/18 to get it there before 12/25.
BackBack

Ultra-Sil Day Pack

Packs down to the size of a tennis ball

$34.95

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with a Lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. These ratings require a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.

Description

The Ultra-Sil™ Day Pack won the Backpacker Editors' Choice Gold Award in 2017, meaning this little pack has stood the test of time and sustained its best-in-class status for more than 5 years. It is perfect for a summit pack, carrying groceries when on foot, on a bike or as an extra traveling tote. The tiny packed size of this perennial best seller fits easily onto your key ring, in a jacket pocket or a purse and the reinforced bar-tacks at all stress points enable it to withstand loads 250 times its own weight. A small but mighty essential.

Features

  • The Ultra-Sil Day Pack won the Backpacker Editors’ Choice Gold award, 2017
  • Packs down small so it easily fits in pockets, purses or luggage
  • Stuff sack has an attached carabiner
  • Simple, streamlined design so it's light and low profile
  • Siliconized CORDURA® fabric for strength and durability
  • Bartack reinforced stitching on all stress points
  • Two-way zipper closure
  • Reinforced shoulder straps for increased carrying comfort
  • Webbing daisy-chain attachment point can hold a bike light

Technical Features

30D Ultra-Sil®

An incredibly lightweight yet durable fabric used in a large number of Sea to Summit products. This 30 denier Nylon is made with CORDURA® yarns for strength, woven into a ripstop pattern. Two versions of the fabric are used:

  • water-resistant products (such as the Ultra-Sil™ Stuff Sacks) are siliconized on both sides for ultimate packability
  • waterproof products (such as the UltraSil™ Dry Sack are) siliconized on the outside and PU-coated on the inside to allow seam taping.

Both versions have a hydrostatic head greater than 2000mm – which makes them more than adequately waterproof for the types of environments they are intended for.

Cordura®

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.

    Tech Specs

    Product Details

    Best Use
    Summit Pack, Groceries, Travel
    Dimensions
    11 x 8 x 19 in / 28 x 20 x 48 cm
    Fabric
    Siliconized Cordura fabric for strength and durability
    Gear Capacity
    20L
    Packed Dimensions
    2.5 x 3.5 in
    Special
    Attachment point for a bike light
    Waterproof
    Waterproof Material
    Weight
    2.5 oz / 72g
    Zip Options
    Two-way zipper closure

    Customer Reviews

    Based on 25 reviews Write a review
    Scroll To TopScroll To Top