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Shave weight off your compression sack system, and make it waterproof by switching to the Sea To Summit eVent Compression Dry Sack.

Sea To Summit used waterproof breathable eVent material to make the first waterproof compression bag without a valve—the eVent Compression Dry Sack. Close this Sea To Summit compression sack, and the breathable material vents air as you cinch the compression straps. No more soaked sleeping bag after a rainy day, and no more valve poking you in the back as you hike. On top of the water protection and low bulk, the eVent Compression Dry Sack weights a scant 5.2oz (medium size).

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Sea To Summit eVent Compression Dry Sack

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Here's what others have to say...

4 5

ma.p489127

Member since 

These are well made. Packed them full and pulled it down very tightly with no problems at all. Kept crazy dust out of my clothes in a windy moab.

I'm going to buy Marmot Helium large...

pay4638784

Member since 
Posted on

I'm going to buy Marmot Helium large sleeping bag. What size compression sack would you recommend?

Alexander S

Member since 
Responded on

I'd go with the medium. I have the Lithium regular which is the next size up and it fits well in the medium.

5 5

Alexander S

Member since 

These are awesome compression sacks. I have the XS, S, and Medium sizes and they are usually the only things I put my clothing and sleeping bag in. I have tested the hell out of these things. They have always kept my stuff dry including a 2 week trip in Europe where it poured almost everyday. I usually try to get my stuff in the smallest possible package so I ratchet the compression sack pretty hard and I haven't had one problem in the past 3 years. Great Stuff! I ended up buying several sea to summit dry sacks in addition to their compression sacks because I love these so much.

5 5

rsop505180

Member since 
  • Gender: Male

My synthetic Mont-Bell Super Spiral Burrow # 3 (reg) fits well in the SMALL, 10L. It really gets my sleeping bag condensed, and water proof.
I think that a medium will fit most synthetic 20*+ mummy bags on the market today, and large should accommodate most of the rest out there. Just my opinion based on trial.

Synthetic bag fits in SMALL (10L)
5 5

adventuress

Member since 

I used this to store my down bag on a bike tour up the PCH. I had it strapped on top of my bike rack, and the yellow bottom helped me standout during the day to oncoming traffic. One of the days that I was biking, I got caught in a pretty severe squall along the highway--hours of sheets of raining slamming into me & trucks sending waves over me. Water managed to get into my panniers, even though they were the waterproof roll-top kind. Amazingly, my sleeping bag stayed completely dry! Even though it's more expensive than other compression sacks and it weighs more, I will never use a different one. I would have been really cold and miserable at camp that night if this sack hadn't saved my sleeping bag :) I used a 20L bag for my 0-degree.

4 5

Aaron Crabb

Member since 

Got this item in size Medium to secure a Rab 0 degree down bag (women's) on a multi-day float trip. Works really well in all respects. Stuffs, compresses, stays dry.

What size sack should I get for a Marmot...

timng85

Member since 
Posted on

What size sack should I get for a Marmot Never Summer Membrane 0 Degree Sleeping Bag? I dont know the dimensions for this sleeping bag because it was never listed in the Tech Specs.

Phil Maher

Member since 
Best Answer Responded on

Hey,

With a little effort, we use the medium for ours, but using a large makes it easier. The trick is to use the factory stuff sack specs as your starting point in choosing a compression sack. For the Never Summer, that's 8.5x18".

Alexander S

Member since 
Responded on

definately a medium. I have the Marmot Lithium and it fits well in the Medium.

5 5

Laura

Member since 

I use this in the large to pack my down sleeping bag, because I would be screwed if that got wet! Luckily, it never has. Definitely recommend this bag to everyone I know,

5 5

kzoodan

Member since 

I have two of these compression/dry sacks. One in size medium for my wife who insists on bringing half the closet, and the small for myself.

The medium holds a hoodie, and 4 days worth of clothes for her.

The small holds fleece and 5 4 days worth of clothes for me.

Both bags passed the bathtub test with flying colors. I have yet to encounter a downpour I was't prepared for in the woods, but I'm confident I'd have dry clothes with these in my pack.

The bags both compress an incredible amount, and the eVent fabic at the bottom lets the air, but not water in.

5 5

mattymeis

Member since 

I don't know how I made it without one of these. They compress so much and will open up a lot of space in your pack.

5 5

pgunnz

Member since 

I am usually wary about compression bags because a lot of the time they are just added weight for little compression. I have used the eVac dry bags for clothes and my sleeping bag and they worked pretty well. I decided to try the compression version after all the positive reviews and was truly impressed. It got my long Marmot Sawtooth down to a little bigger than a basketball. It is really easy to use and I know it will keep the down nice and dry.

maler2260376

Member since 
Responded on

Hello, which size of eVent compression sack you use for your Marmot Sawtooth?

Alexander S

Member since 
Responded on

Hey Maler, my cousin has the same bag. Medium should do it.

pgunnz

Member since 
Responded on

I use the 20L because my bag is long not the regular length. The 20L also gives me a little extra room for other gear such as my Therm-a-rest down pillow. You really can't go wrong if you get it a little larger, but if you get it smaller than what you need you will be kicking yourself.

5 5

Carson Dunbar

Member since 

I hunted these suckers down when I saw them in the Backpacker Magazine Gear guide back in '07. I've been using the same one up until last weekend. It's held up and maintained waterproofing the whole way. Last weekend it had an unfortunate introduction to a sharp tree branch.
This is BY FAR the best dry sack I've owned. and having four compression straps makes cinching things down, well a cinch! I used a medium for my North Face Aleutian and it managed to pack it down smaller than a volleyball! It saves so much room in your pack for other gear.
A straight up must have for any backpacker.

5 5

Lyle

Member since 

I use it for my Marmot Couloir long 0 degree (800 fill) down bag.
The large was the best size, and I tried it in medium through XL. When picking your size I'd recommend going up a size if you have any question. The larger circumference will make it easier to stuff and since its a compression sack it'll just be a little shorter to achieve the same volume. I would choose by circumference/width, not so much by volume, as any extra volume will be compressed. Also, being a roll top you need some extra length... The large says its 20", mine measures 23" unrolled but if I were to only have 3" on top to roll closed it would be nearly impossible. I have about 7" extra when I stuff my bag in and it makes it easy to close. Once it's compressed the extra length is irrelevant.
Having said all that, this is a fantastic piece of gear for anybody taking a down bag or anything else they'd rather not get wet into the backcountry. Under the right circumstances this bag could save your life, or at least save you some serious discomfort! It also breathes much better than any dry bag I've previously used.
I use it backpacking, usually in winter mountaineering situations.

Ive got the sierra designs zissou lite...

Justin

Member since 
Posted on

Ive got the sierra designs zissou lite dridown sleeping bag, it says 7x16 stuff sack size. Should I go with the same size [S] 7x16 or smaller [XS] 6x14 ? Can anyone help me out? Im not trying to fight the bag into the sack every morning or run the chance of damaging it. thanks for the help.

Pat Palmer

Member since 
Best Answer Responded on

Don't go smaller than what the manufacturer reccomends. You'll end up with a fight every time when packing up your bag.

Lyle

Member since 
Responded on

I'd go with the medium actually. The mouth of the sack seems slightly smaller than the width of the rest, unlike my regular stuff sack where the mouth is at least as wide as the rest of it, if not the widest part of the sack. Going up an inch in width will make it easier to stuff and any extra volume will just be compressed.

5 5

Adam Lloyd

Member since 

Seem top notch quality, and definitely waterproof.
I use the small for my Ambler jacket, the medium for my Ridge Runner 15, and the XS for my Transcendent Hoody or Warm and Light 650.

Which size bags would fit my womens Helium...

Brad V

Member since 
Posted on

Which size bags would fit my womens Helium and my mens Helium long membrain or are they both going to fit in the same size?

Phil Maher

Member since 
Best Answer Responded on

Hi Brad,

For any compression sack, size it the same as the the stuffed dimensions on the sack that came with your bag(s). I think for the Heliums that's about 6x12". For this STS comp sack, that works out to the Small. That said, my tendency is to accept a slightly larger diameter (but still the same finished length) in trade for not fighting stuffing and rolling the top of the sack every morning, so I always use one of my mediums for my Marmot 0*. Too much compression, too often, really damages down...just so you know.

5 5

Will Palmer

Member since 

Have used these things to hold everything from clothes to my tent and sleeping bag. Compresses down to smaller than anticipated and is waterproof like you wouldn't believe. If you are thinking about getting this just stop whatever you are doing and buy it NOW.

What size would be good for the marmot...

Michael

Member since 
Posted on

What size would be good for the marmot limelight 2p tent (body, footprint, fly)? The packed dimensions of the tent is 7x21, so minus the poles I dont know what size compression sack to use.

Phil Maher

Member since 
Best Answer Responded on

Hey,
Large might seem the logical choice because of the volume comparison to the 7x21", but go with a Medium. You still won't have to fight to stuff it every morning on the trail, and it'll go in easily and honk down to as small as you're going to get it.

Alexander S

Member since 
Responded on

I use a small actually for my Big Agnes 3 person. I usually don't have the footprint though, because someone else carries it to share weight.

What size should I pick for my WM Versalite...

foxp114045

Member since 
Posted on

What size should I pick for my WM Versalite sleeping bag?

Phil Maher

Member since 
Best Answer Responded on

Honestly, my WM bags are the one thing I don't ever compress. But, I would use a Small and be sure to give it extra time to loft back up before you plan on crashing out.

4 5

Rachael Van Dolah

Member since 
Groups:
  • Gender: Female
  • Familiarity: I've used it once or twice and have initial impressions

This compression dry sack is nice and light weight, easy to close and compress, durable, and overall a great addition to your gear.

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