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  • High-loft 750-fill-power down offers superb warmth with minimal weight; Ultra-Dry Down™ water-repellent treatment protects down from moisture
  • Ultra-Dry Down is a water-repellent polymer treatment applied to the down; Ultra-Dry Down retains 60% more loft and absorbs 30% less moisture than untreated down
  • With a European Norm (EN) lower-limit rating of 50°F, the Sea to Summit Traveller Tr I will keep you comfortable on summertime backpacking adventures
  • Traveller Tr I can be zipped together with another Traveller Tr I when you're not alone; Large size will comfortably accommodate 2 people when unzipped and used as a blanket
  • Has a lightly tapered shape with collar and foot drawcords that can be cinched down to seal in heat and a create a mummy-shaped bag
  • Lightweight ripstop nylon shell can be reversed so either the gray or teal color is on the outside
  • Sea to Summit Traveller Tr I Sleeping Bag includes a lightweight Ultra-Sil compression stuff sack and a mesh storage bag


View all Sea to Summit Men's Sleeping Bags

REI membership


Best Use Backpacking, Travel
EN Lower Limit 50 degrees Fahrenheit
EN Comfort 57 degrees Fahrenheit
Temperature Rating (F) 50 degrees Fahrenheit
Temperature Rating (C) 10 degrees Celsius
16.8 ounces
13.7 ounces
Ultralight Yes
Shell Ripstop nylon
Zipper Location Left/Right
Insulation Type Down
Water-Resistant Down Yes
Fill 750-fill duck down
Fill Weight
8.8 ounces
7.1 ounces
Lining Nylon
Sleeping Bag Shape Mummy
Fits Up To (in.)
79 inches
72 inches
Shoulder Girth (in.) Unavailable inches
Hip Girth (in.)
58 inches
53 inches
Stuff Sack Size
5 x 10 inches
4 x 9 inches
Stuff Sack Volume
3.3 liters
2.5 liters
Compressed Volume
1.89 liters
1.55 liters
Gender Unisex
Rated 5 out of 5 by from Great for a warm night or a warm hut! I used this sleeping bag recently on a backcountry ski trip to a hut on the continental divide. It was perfect! Light and small in my pack. And plenty warm in the hut... I slept with the bottom-end draw string open! Best things about it: --The bag weighs only 14 ounces and comes with a compression sack. It packs down to an incredibly small size. I put it in a 5 Liter Sea to Summit eVac Dry Sack and had plenty of room for a sleeping bag liner. --It has a full length zipper on one side (it’s a really small zipper, so you have to be a bit careful opening and closing it). It also has a drawstring at the foot end of the bag so you can open it up for ventilation. --In summer I will use the bag opened up as a comforter.
Date published: 2014-04-25
Rated 5 out of 5 by from Every night Awesome travel sleeping bag! It weighs nothing and take up almost no space! I actually take it on my carry on usually and pull it out during long layovers in overly air conditioned airports. I actually spelt in this bag every night for almost 6 months. Starting off in Australia, it was almost too hot for this bag some nights and living in a hostel it didn't get too cold, but I went camping quite a bit and one stretch of time I was pretty far inland and the temper dropped to around 40F at night and with a sleeping pad, base layers, and this bag pulled over my head and synched shut I wasn't cold at all. At this point I should add that I'm 6' tall and have the large bag. Also in Europe this came in handy while in hostels with poor heating. Never spent a night cold.
Date published: 2016-04-04
Rated 5 out of 5 by from Warm Summer Bag I received this bag as a gift just before a 4 night car camping trip to Hot Springs NC. The overnight temps were in the high 50's to low 60's and this bag was very warm. The only problem I had was kicking open the foot draw cord. It didn't matter because the bag and weather were warm.
Date published: 2014-06-03
Rated 4 out of 5 by from Can't beat it for the weight Bearing in mind the temperature rating of this bag, this is amazing value. I'm a keen backpacker and bike camper, and I live in California where summer nights are often above 50. I got tired of schlepping around my 2lb, 25F bag. I've used this on most of my adventures last summer, and it worked a charm. I did buy Sea to summit's warmest liner, which packs a surprising punch. Also, I always have good base layers because it's what I wear in the evening - and I do sleep with them, so they add something. Given that I always want to use a liner (keepin' it clean!) and base layers, this bag adds just the amount of extra heat I need. I look forward to warmer camping nights where I'll use this as a quilt too. Last weekend I camped where it was supposed to be 45F overnight. I hesitated - I'd only used this bag above 50F - but it's so much smaller and lighter - and there was going to be so much climbing - that I took it. The night turned out to bottom at 30F, and while I wasn't warm - I woke up a few times from the cold - I still slept most of the night, which is saying a lot considering this is 20F below the rating for this bag. The only bad thing being that the drawcord on the footwell is super easy to open up by mistake - I've had to get good at flipping my feet over and closing it up with one hand! In other words, if you live somewhere with regular warm nights (45F and up), and you want to save on weight and/or space, this is an awesome piece of gear.
Date published: 2015-02-03
Rated 3 out of 5 by from Light but not warm I really wanted to love this bag. I have a lot of other S2S gear, and it's all top quality, so I had high hopes. I bought it so cut ounces- it is super light, less than a lb, and if you use the included stuff sack it compresses to a little larger than a tall boy can size- hard to beat that. But what I do not like, is that because of the cut of the bag, you just cannot snuggle down into it if it's chilly at all. This is truly a hot weather bag. I would not take it out in less that 60-65 degree nights. It's also very narrow- and I am a very average sized person- 5'7,150. If I gain any weight this is going to feel claustrophobic. I'm on the fence as far as trading it in, because it does have qualities I like. It would work great as a quilt or a liner, but at that point I don't know if it's worthcarrying the extra weight. I also like that the down is sourced. So if you are fairly small/average sized and just want strictly a warm weather, lightweight bag, by all means, this is a good choice. If you're ever going to need more warmth (I took this to the White Mountains in July, bad idea). Keep looking - you may be better off with a Mtn Hardwear or Western Mountaineering bag.
Date published: 2015-07-19
Rated 3 out of 5 by from Weight is great, warmth not so much I am using this bag right now on the Long Trail. It's gotten in the low 50s, but certainly not below, and I've been too cold almost every night. The weight/small size are great, and it would be nice for truly hot weather.
Date published: 2016-07-10
Rated 3 out of 5 by from Great Bag - Sloppy Packaging Bag is just as lightweight and warm as advertised. Sadly mine was missing the stuff sack. Perhaps a packaging error? Perhaps someone unzipped the packaging it and removed it? Considering it was ordered online and likely came from the warehouse it probably wasn't retail pilfering. No matter how it happened it was a hassle to have to deal with it.
Date published: 2015-05-29
Rated 5 out of 5 by from Epic! I love this sleeping bag! It opens into a blanket and packs down really small. My feet get claustrophobic in sleeping bags but this one has an option to let your feet out. I'm taking it backpacking in Europe this summer. Highly recommended if you need a light sleeping bag for your carrying backpack.
Date published: 2017-04-07
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Does the weight (13.7 ounces) includes the compression sack?

Asked by: Adrian ZZ
No, that is the weight of the sleeping bag. The Ultra-Sil compression stuff sack will weigh in the 2 - 3 oz. range
Answered by: REIservice
Date published: 2017-03-17

What is the girth at the shoulders, or width of the large bag? And what kind of zipper is it? Example, just running the lenth of the bag. Ykk size 5. Thank you for your consideration. BPL

Asked by: MONA BALOO
The shoulder girth of the Traveller Tr I Sleeping Bag in a medium will be 58 inches. The large will be 66 inches. Both sizes are using a YKK #3 zipper.
Answered by: REIservice
Date published: 2015-09-20
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