Kelty Cosmic Down 0' Long fits in which sea to summit event dry sack????

**pupdog1243** · 03-03-2014, 16:04

OK, so here's my deal:
I own a Kelty Cosmic 0' Down bag in long. I want to put it in a sea to summit event dry compression sack. But which one??? I think I have narrowed it down to a medium, but want to ask the experts. Anybody out there used this sack to hold this bag, and which size?

**Granite06** · 03-03-2014, 20:59

I have a cosmic down 20 regular and use a STS medium event compression bag with a lot of spare room. I would bet that you could get a slightly larger bag to fit in there as well.

**pupdog1243** · 03-04-2014, 09:14

Thanks granite. I just wanted to ask before I placed an order and had to play the return game. Want the bag to fit in the sack perfectly with no extra floppy room so that I can get the best compression.

**Wlb007** · 03-04-2014, 21:47

Please post your result. I have the 0° reg and use the military small compression sack from their 3 bag set. Works great and I can put my 0°incubator in with it but it is not waterproof.

**pupdog1243** · 03-05-2014, 14:02

I haven't ordered yet, kind of waiting on some more input, but I will definitely post results.

**pupdog1243** · 03-21-2014, 08:51

After a bit of research and measuring here is what I came up with:
Kelty lists the bag in stuff sack as 8 x 18.
I had a compression sack form another bag that measures 6 x 14, exactly the same as a Sea to Summit eVent compression in XSmall. The Kelty Cosmic down 0 degree long bag won't fit in it.
I had another compression sack from another bag that measures 7 x 16, exactly the same as a Sea to Summit eVent compression sack in Small. The Kelty Cosmic down 0 degree long bag WILL fit, but it is a tight fit. This is the compression sack I have been using for it.
I bought a bass pro compression sack for 10.99 that measures 9 x 18. This is the sack that caused me to ask the question here. The bag fits, with a lot of room to spare and I ran out of compression strap before it was fully compressed. It went back to the store. I liked the bag, but it was just too big. Seemed to be well made though.
So then I asked the question here, and finally placed my order from campmor. Cost of the Sea to summit eVent compression in medium, which measures 8 x 18, was 31.19 after a 10% discount code i found online. I also purchased a 21" Sven saw so I got free shipping. My thoughts here were that I wasn't sure about how Sea to Summit measures their bags, and with the roll top I felt it was better safe than sorry to order it slightly larger than the bag I had been using. I could always put my extra insulation layer in there with it.

Ill update when it arrives and I actually put the bag in it.

**Robb871** · 03-21-2014, 11:28

I have the Cosmic 20' Long. I'm hoping this thread helps answer the same question for me. These bags don't seem to compress very well compared other more expensive bags, but my budget is spent on gear for now so I just need something to make it as small as possible.

**pupdog1243** · 03-26-2014, 08:38

Brown truck dropping these at my door tomorrow!! Ill update when I have a chance to put the bag in the bag!!

**pupdog1243** · 03-28-2014, 08:30

The brown truck came by my house yesterday and left me a present!! Thanks to everyone who responded on this thread. The STS compression bag in Medium fits my Kelty Cosmic 0' Down long great!! Glad I ordered the Medium and not the small. I dont think it would fit in the small due to the roll top. It was hard enough to not get the bag in the roll closure as it is in the medium. Attached are a few pictures.