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Sea To Summit
Trek TkII Sleeping Bag: 18F Down

4.451612903225806 out of 5 stars
31 Reviews

Out of Stock

Don't worry though, we have a lot more Down Sleeping Bags in stock than that.

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Trek TkII Sleeping Bag: 18 Degree Down

The days are getting shorter, but you're not ready to pack up the camping gear and start praying for snow just yet. Whether winter is just around the corner or has just said its farewells, chilly shoulder-season backpacking trips won't be so chilly in the Sea To Summit Trek TkII Sleeping Bag. The 650-fill down insulation will keep you warm on cold nights, whether they find you in the desert or the mountains. And thanks to Sea To Summit's Ultra-Dry Down technology, your down insulation won't lose its loft if you find yourself in wet and cold conditions, or if your bag happens to get wet throughout your travels.


Verrtical baffeling in the chest prevents the down from shifting sideways as you sleep, keeping the warmth where it's most effective and not anywhere else, while a 3D sidewall baffle lets the down loft all the way to the very edge of the bag, ensuring total warmth. A draft collar around the neck and a full length draft tube along the zipper prevent cold temperatures from creeping in, and if you end up wanting some ventilation in the night you've got two-way functionality on the main and footbox zippers. To keep a phone or headlamp close by you've got an internal stash pocket, and to guarantee that your whole body is warm there's an adjustable mummy hood.


Details

  • Warm down bag for cold nights of camping in the spring and fall
  • Hydrophobic down stays warm and dries quickly in damp conditions
  • Draft collar and tube keep warmth inside and cold weather out
  • Vertical chest baffles prevent down migration as you sleep
  • Two way main and footbox zippers allow for easy ventilation
  • Adjustable hood pulls in tight to keep your noggin warm
  • Large internal pockets keeps items close by and batteries warm
  • Included stuff sack lets you pack it down small to take anywhere
  • Item #STS007G
Material
[shell] 30D nylon, [lining] 20D soft touch nylon
Insulation
650+ fill Ultra-Dry down
Shape
mummy
Zipper
full-length, two-way
Max User Height
[regular, regular wide] 6ft, [long] 6ft 4in
Shoulder Circumference
[regular] 60in, [regular wide] 68in, [long] 64in
Hip Circumference
[regular] 57in, [regular wide] 63in, [long] 62in
Foot Circumference
[regular] 40in, [regular wide] 48in, [long] 43in
Bag Length
[regular] 6ft, [long] 6ft 6in
Draft Tube
yes, neck collar
Pockets
[internal] 1 stash
Pad Retainer
no
Fill Weight
[regular] 1lb 2oz, [regular wide] 1lb 4oz, [long] 1lb 5oz
Degree
18F
European Norm/ISO Comfort Rating
30F
European Norm/ISO Lower Limit Rating
18F
Stuff Sack
Ultra Sil compression bag
Stuff Size
18 x 9 x 9in
Claimed Weight
[regular] 2lb 2oz, [regular wide] 2lb 7oz, [long] 2lb 6oz
Manufacturer Warranty
lifetime

Overall Rating

4.5 based on 31 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 2 reviews
3 Stars - 1 reviews
4 Stars - 5 reviews
5 Stars - 22 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
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5 out of 5 stars

March 18, 2024

Dad Bag

[This review was collected as part of a promotion.] I personally love this bag. It reminds me of a NorthFace sleeping bag my dad gave that I had to throw away because I used it so much and was from the 80's. So this is not an objective review at all.

David F.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

March 15, 2024

Trek Down Sleeping Bag

[This review was collected as part of a promotion.] I purchased the new sleeping bad for the 6 day OTLHT backpacking trip after a cold front was predicted. It arrived in time and just as advertised it was small and fit perfect in my backpack. I stayed nice and warm with plenty of room. I would buy the same backpack again. It was a great choice.

Janet M.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

February 12, 2024

Down sleeping bag

[This review was collected as part of a promotion.] Great sleeping bag, especially for the price. Kept me warm even when it was windy and below freezing

Brandon M.
Sea to Summit

Originally reviewed on Sea to Summit

4 out of 5 stars

May 31, 2023

Should have one

Size Bought:
regular
Height:
5' 3"
Weight:
127

I took the TKII to the Everest base camp and Gokyo Lake route in April 2023 and used it every night for my 15 days trek. I live in Thailand where the weather is extremely hot so I'm not quite used to the freezing climate. However, this sleeping bag kept me warm quite well. On a very cold night, I put a sachet of warm hand to add up the heat between the foot box and it's very comfy and warms your toe for the long day after trekking. The TK II kept the heat and spread over the area where I put the warm hand in very well. To add up a little more, I'm not used to wearing a down or fleece jacket in the sleeping bag because it made me feel uncomfortable during sleeping so I end up wearing the base layer and slept in this TKII only. Size and weight are acceptable with the price but wish this TkII can be compressed and lighter a little more to save the space weight in the duffel.

5 out of 5 stars

May 22, 2023

The bag I've always needed.

[This review was collected as part of a promotion.] This bag is great, it is super comfortable, is relatively roomy and packs very well. The fabric inside is very comfortable as well. Great bag.

Michael E.
Sea to Summit

Originally reviewed on Sea to Summit

4 out of 5 stars

February 23, 2023

Untested but nice so far

Familiarity:
I've used it once or twice and have initial impressions
Size Bought:
Regular
Height:
5' 7"
Weight:
190

I bought this bag to replace my zero degree synthetic Kelty bag which was just too big to use when packing. I really need the warmth for the shoulder seasons because I sleep a little cooler. I have yet to take it out on a trip but just testing it out at home the bag is super comfortable and compresses into a small footprint taking up little space in my 70L bag. Having the extra space means I can carry more of the essentials in my bag rather than strapped to it. The fit is nice and roomy and the spacious footbox really appeals to me since I move around quite a bit. Looking forward to a late spring trip here in the Rockies.

John P
5 out of 5 stars

April 3, 2022

Fantastically comfortable bag! It’s cut

Fantastically comfortable bag! It’s cut more generously than many mummy bags, making it maybe better for bigger folks. Warmth is very good, and the foot box is big enough for bigger feet or pointed toes without compressing the insulation

Graeme L.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

January 13, 2022

Awesome bag

Only used it twice so far. Nice and light. Packs well. Seems great so far!

Dustin V.
Sea to Summit

Originally reviewed on Sea to Summit

4 out of 5 stars

January 5, 2022

Seemed like a great bag, but I got someone's return item

Seemed like a great bag, but I got someone's return item

Angela C.
Sea to Summit

Originally reviewed on Sea to Summit

2 out of 5 stars

November 9, 2021

Very Dissapointed

I was looking for a quality 3 season bag and settled on the Trek TK2 after trying the marmot sawtooth and mountain hardwear bishop pass. I really wish I never bothered with this sleeping bag, I had a suspicion that the seams wouldn't hold up and I was right. After 3 days of use the down has started escaping through a few seems in the hood, one seem in particular quite substantially. For me that is a huge disappointment from a company that I expected a quality product from. Some additional dislikes, the zipper snags a lot more than the other models I tested, and the draft tubes are a little underwhelming. I wish this bag had a vaulted footbox but I can live without that. The bag is comfortable, more roomy than the bags I mentioned above, and the materials feel nice on the skin. It is also quite warm and has a good aesthetic, but the lack of quality is my main reason for a low rating. Hoping customer service comes through and provides a solution. I simply wish I could return it at this point.

Jonny
Sea to Summit

Originally reviewed on Sea to Summit