Sea to Summit Ultra-Sil Drysacks

Weighs 30g (8 Litre size)
Code: OC316V
  • From £7.99
  • (FREE UK & EU Delivery)
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Sea to Summit Ultra-Sil Dry Sacks are a super light weight dry sack designed for use inside a pack. Made from Siliconised Cordura for maximum durability Ultra-Sil Dry Sacks will keep your pack light and you gear bone dry! Ultra-Sil Dry Sacks use Beamis Seam Tape which is the highest quality available

All sea to Summit Dry Sacks use Hypalon instead of webbing on the roll top closure. Hypalon does not wick water into the closure unlike webbing Ultra-Sil Dry Sacks are constructed using Coats Brand threads which are the global leader in threads and sewing products. We use a short stitch length to ensure a high degree of quality

Roll top closure is precisely designed with a longer Polypropylene stiffener opposite the Hypalon which helps seal the closure flat which further improves watertight seal and means that the roll top closure is less likely to unroll when under pressure A custom designed shorter symmetric side release buckle can be clipped together either way around which also aids keeping the roll top closure secure

All seams are top stitched which keeps taped seams flat and even 1 L 2 L & 4 L are flat rectangular shaped design. 8 L 13 L 20 L 35 L are round base design. All sizes in the Nano dry sacks have an oval base design.  

How about this - Feather light bone dry! We believe these are among the lightest dry sacks ever invented. Not only is the weight revolutionary but the hypalon roll top and siliconised finish eliminates wicking to ensure a dry seal.

Getting very good reports about the Drybags from customers. These Sea to Summit (STS) Ultrasil Drybags are a similar product to POD Ultralite Drysacs - the difference is that the POD version has a larger buckle fastener and a haul strap across the base this makes the POD sacs a few grams heavier in each size.

  • Waterproof seams double stitched and tape seam sealed
  • Sizes 1-4 Litres have sewn across base sizes above this have circular base.
  • Water tight Hypalon roll top closure
  • Siliconised Cordura for maximum durability
  • PU coated for ultimate waterproofing
  • 6 sizes; 1 to 20 litres
  • From 20 to 50 grams!
  • 1 Litre 16cm(flat)x 25cm / 0.7 oz / 20g
  • 2 Litre 20cm(flat)x 32cm / 0.8 oz / 23g
  • 4 Litre 24cm(flat)x 38cm / 0.9 oz / 26g
  • 8 Litre 17cm(dia)x 46cm / 1.1 oz / 30g
  • 13 Litre 22cm(dia)x 53cm / 1.4 oz / 40g
  • 20 Litre 25cm(dia)x 61cm / 1.8 oz / 50g
  • 35 Litre 30cm(dia)x 70cm / 2.7 oz / 74g
Showing our 2 Sea to Summit Ultra-Sil Drysacks reviews with an average rating of Very Good. Would you like to write a review?
Review Summary - 4 out of 5 based on 2 ratings.
September 24, 2018 | Christopher Smith
Absolutely waterproof

Really great bags. I packed my clothes in the 13L bag on a two week hike and I noticed each time I unpacked that not only had no water got in, it hadn't even let any air in. Completely impermeable. Can't comment on their durability as I only used the bag for two weeks, but it showed no sign of wear that I can see.

August 24, 2018 | TAR
Not a long term solution.

These aren’t expensive, really, but nevertheless they suffer from a flaw that, for me at least, rules them out: the material has no inherent waterproofness but relies on a coating or layer of waterproof chemical impregnation. This means they are waterproof until they aren’t, which we discovered on a recent trip. Our clothes were wet (not soaked, but much more than damp) and the bags were tightly sealed. This was demoralising in an environment in which there was no drying (Wales, middle of nowhere, raining). As for not being expensive, we had 4 of them, so not cheap, either, and at a rough estimate these had seen no more than 6 weeks continuous use over 4 trips. And going back to garden refuse bin bags ( tougher than standard types ) is something we are unwilling to do given they are fit only for the bin themselves after a fortnight in the field.

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