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Ultra-Mesh Stuff Sack

A visibly better way to pack your bags

$11.95 – $19.95

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.


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The featherweight Ultra-Mesh™ Stuff Sacks are the perfect solution for organizing gear in your pack or travel bag. They're made from a 15D multi-filament Nylon, and pack down super small. The Ultra-Mesh Stuff Sacks are available in multiple sizes and are ideal for ultra lightweight packing organization.



Your scale will hardly notice the difference when you start using these

Best Use

Internal pack organization, drying items, keeping things stink free

What this bag could hold

1 liter: snacks, wallet & keys
2 liter: some snacks and drinks or extra layers

4 liter: a layer and a meal or so worth of food
8 liter: a puffy jacket & a sleeping bag or food for 2-3 days
13 liter: all your clothes for a trip
20 liter: a tent or any Sea to Summit sleeping bag
35 liter: paddle gear, overnight camp equipment or bike gear


  • 15D multi-filament Nylon mesh for strength
  • Ultra-Sil™ Nano™ draw-cord throat for smooth operation
  • Sea to Summit logo label and size label used to pull stuff sack open
  • Double stitched and reinforced seams for greater durability
  • Black mesh for better visibility
  • Round base design

Technical Features

Ultra-Vis Bug Mesh

Ultra-Vis Bug Mesh is made of an incredibly fine 15 D multi-filament polyester, so it is amazingly light and packable. The hexagonal mesh has 500 holes per squarer inch (80 holes per square centimeter) to provide protection from most insects while offering excellent airflow.


Please note – this fabric is not no-see-um proof

Tech Specs

4 x 8.5 in / 11 x 22 cm
2.5 L
0.2 oz / 6 g
5.5 x 10.5 in / 14 x 27 cm
4 L
0.3 oz / 8 g
6.5 x 12 in / 17 x 30 cm
6.5 L
0.4 oz / 10g
7 x 13 in / 18 x 34 cm
9 L
0.45 oz / 11 g
8 x 16 in / 21 x 40 cm
15 L
0.5 oz / 14 g
9.5 x 17.5 in / 24 x 45 cm
20 L
0.6 oz / 17 g
10 x 21.5 in / 26 x 55 cm
30 L
0.7 oz / 20 g

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