Sea to Summit Ultra-Sil Day Pack

20 Litres / No Frame
Weighs 72g
Code: SS18462
  • £24.99
  • (FREE Delivery on orders over £15)
+ In Stock Now | Usually dispatched within 24 hours

Great as a summit pack carrying groceries when on foot or on a bike or as an extra traveling tote. The tiny packed size fits easily onto your key ring in a jacket pocket or a purse. 

Sea to Summit says:

Since it's first release in 2008 the Ultra-Sil Daypack has impressed users with it's incredible strength to weight performance. The use of siliconised CORDURA nylon and reinforcing bartacks at stress points enables the Daypack to carry loads 250x it's own weight.

In 2017 the Ultra-Sil Daypack won the prestigious Backpacker Editors Choice Gold Award for outstanding innovation in design, materials and performance. To celebrate we have upgraded the Daypack and brought a new look to the entire Ultra-Sil bag range.

Sea to Summit's Ultra-Sil Day Pack is a superb design, it's amazingly strong - so much so that you don't have to worry about abusing it. This is ideal as an aircraft carry on with minimal weight penalty and you can use it as a stuff sack when you hit the trail.

These days your pack will generally go into the aircraft hold because you will almost certainly have items that are not allowed in the cabin such as a knife, trekking poles, sharp tent pegs etc.. Just in case the bag never reappears I like to take some items as hand luggage - tent sleeping bag sleeping mat etc things that can't be replaced easily at the other end. Using the Ultra-Sil Daypack is the ideal way to do this. All in all you shouldn't be without one.

- Reviewed by Ultralight Outdoor Gear

Help and advice:  Choosing a rucksack at Ultralight Outdoor Gear    
  • Reinforced shoulder straps to reduce bunching up when carrying heavy loads and ergonomically shaped for better fit
  • Webbing daisy-chain on front for a bike light
  • Made from Ultra-Sil CORDURA nylon with Polyurethane (PU) coating providing a hydrostatic waterhead of 2000mm
  • Ultra-Sil stuff sack with handy aluminium carabiner
  • Large capacity, great for lightweight travel
  • Packs down small to fit easily in pockets, purses or luggage


  • Weight: 72g
  • Capacity: 20 Litres


Showing our 1 review for Sea to Summit Ultra-Sil Day Pack. Write a review ›
Review Summary - 5 out of 5 based on 1 rating.
July 12, 2018 | Artjom
Ultra light day pack

The SeaToSummit 2018 Ultra-Sil day pack is the lightest you can get. I have checked its weight on my scales and it showed 71g (including stuff sack) + 4g for aluminium carabiner. Great volume of 20L for this weight. The stuff sack is part of the bag and can be used as an inside pocket for keeping small things like keys, money, etc. Also, it means that you will never lose it. Webbing loops on the bottom can be used for attaching small items like bicycle lights. The shoulder straps are comfortable, but they lose their shape when bag gets heavier. Zipper makes it easy to access anything in your bag. I have tested it for water resistance and I am 100% sure that my things will stay dry unless it's some crazy storm or it gets submerged. Second test - after filling this backpack with 10L of water some stitches and zipper began to leak. I purchased this backpack as I was looking for something light, strong, comfortable and easy to carry with when there was no need for backpack. Great item, amazing quality!

Ultralight Outdoor Gear Limited