Basecamp™ Synthetic Sleeping Bag for Camping by Sea to Summit

The Basecamp™ Thermolite® synthetic sleeping bag is for those who preferred style of camping is returning to the same campsite each evening to a luxurious and versatile sleep system. Each side of the Basecamp has a full-length side zipper; a third zipper can be found in the foot box zipper. The result is unmatched ventilation and the ability to remove the entire top section to use as a quilt.

WaveLoft™ construction allows the Thermolite® insulation to expand out into air-trapping curves for maximum warmth, and the overall shape of the Basecamp allows you to sleep in any position you choose.

Is this synthetic sleeping bag…?

Warm enough for cool weather camping or travel? Yes. The quality insulation and technical construction keep you warm even on chilly nights. The Basecamp 10°F – paired with a high R-Value sleeping mat, like the Comfort Plus Insulated, would be warm enough for Spring through late Fall.
Fitted with a sleeve to slide in a sleeping mat? No – it is fitted with something better! The lower part of the Basecamp is fully insulated to avoid cold spots – elasticated straps on the underside attach to a sleeping pad of your choice to form a roomy, cozy sleep system.
Suitable for summer temperatures? Yes. The full-length side zippers and foot box zipper can be opened for ventilation or to remove the upper section completely for use as a comforter in really warm weather. And – the main side zippers can be zipped to another Basecamp or many other Sea to Summit sleeping bags.

Learn more about choosing the right sleeping mat to build a perfect sleep system HERE

Highlights

Best Use

Car Camping

Performance

3 Season: 20°F (comfort range 20°F to 65°F)
3.5 Season: 10°F (comfort range 10°F to 60°F)

Shape

A generous shape to allow you to sleep in any position without compressing the down insulation and creating cold spots.

BONUS

Elasticated straps to attach to a sleeping pad of your choice

FEATURES

High-quality Thermolite® insulation is loftier and more durable for lasting warmth.
Full-length YKK® #5 main side zips and foot box zip provide unmatched ventilation and allow the top section to be removed and used as a comforter.
Elasticated straps to secure a sleeping mat underneath the sleeping bag.
Shaped hood and zipper draft tubes keep cold out and warmth in.
Form a snug sleeping bag for two by zipping to another Basecamp™, Explore™, Ascent™, Trek™, Traverse™, Altitude™, Journey™ or Venture™ sleeping bag.
Includes 70D nylon compression bag.

4.5 8 Reviews

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8 Reviews

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04/08/20

Dlwiii

10/21/19

Great for cold weather

I needed a cold-weather bag for the winter. The only one I had was a huge and heavy so wanted one I could more easily carry into the wilderness

For the warmth, it gives this bag packs amazingly small. Very comfortable in the mid-30s. The zipper area has tape around it that makes a nice seal to hold in heat. It has a pullout holder and attaches to a sleeping pad so your sleeping arrangement does not come apart in the night.

Katie J.

05/29/19

Love

I love this bag because it is warm, comfortable, and roomy for a tall user that also packs reasonably small.

Craig has used this bag for 4 years or so. Craig is 6'4", so being tall; it fits him well and is roomy. Craig tends to sleep on his side, which this bag allows for, as opposed to a mummy bag. Although this is a larger bag, it packs small, and Craig uses it for motorcycle travel (where size and ounces matter). It's nice to have zippers on both sides; easy in and out. Has held up well with very regular use. Craig likes the ability to unzip the foot area for added ventilation when it's hot. It's a great bag. I've been trying to get Katie to switch from her Big Agnes Bag to a Sea to Summit Bag because I like it so much.

Lance

07/18/18

Spacious and Great Features

I am a side sleeper and I hate the strait jacket feel of typical sleeping bags (even my big and tall Coleman, at 39" wide, it narrower than I prefer). This bag fits great! I'm 6'1", 225 lb, but I have wide-ish shoulders, but my shoulders have plenty of room in this bag and I don't feel cramped. I also love the six separate zippers (although they admittedly add weight). I haven't taken the top quilt off yet, but you can open this bag just about any way you like. I also like how the pad attachment system is not a long sleeve but instead the footbox connector plus two straps. I don't like attaching the footbox because I sleep on my side with my knees drawn up. You can't do that if your 100% attached to the pad. But with just the two straps and the footbox free, it is really great. I stay attached to the pad but I can still draw my knees up. It's warm too, but I've only used it on warmer nights, so I can't yet comment on how it does at 25 deg. But having the zippers really helps to shed unwanted heat.

My only complaint is that the included compression sack is REALLY tight. Very hard to get the bag in the sack. But I wrote S2S as I was worried my son wouldn't be able to get the back in the compression sack and they sent me an XL compression sack that fits much better. Great customer service!

Even with that, I highly recommend this sleeping bag. Really glad I bought it!

Kyle

02/27/18

the bit of extra space for turning at night, etc. I tend to get a bit claustrophobic in tight mummy bags,

It's a great all around bag. It's a wonder that more bags do not have simple features such as sleeping matt connection. I've recommended to several friends.