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4.0 2

Sea to Summit

Trek TkII Sleeping Bag

From $304.90
or 4 easy payments of $76.23 with

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92 Richmond Rd, Keswick SA Mon - Wed: 9am - 5.30pm
Thurs: 9am - 7.30pm
Fri: 9am - 5.30pm
Sat: 9am - 5pm
Sun: 12pm - 5pm
17 Doherty St, Brendale QLD Mon - Fri: 9am - 5.30pm
Sat: 9am - 5pm
Sun: 9.30am - 2.30pm

The Sea to Summit Trek TkII is designed for those who like the versatility of a tapered bag, but don’t want to feel constricted while they sleep. At just over 1kg and packing down to 6L and with -1⁰C in warmth, the TkII is the ultimate all-rounder.

The bag incorporates highly breathable 2D PermaShell™ fabric which will keep your down in tip top shape. The tapered rectangle design makes the Trek ideal for people with a larger frame or who prefer a roomy bag. The full-length side and foot zips mean you can zip it wide open and use it as a quilt for balmier nights, or have your feet poking out if you need some air flow while you sleep. And, in colder weather, the two-dimensional hood is will help trap warmth for a soundless night’s sleep in the elements.

Featuring an oversize internal pocket that’s big enough to keep your wallet, passport, and gadgets close while you doze. The included lightweight Ultra-Sil® compression bag will compress the bag down to a mere 6L for easy packing. The Trek Tk2 is the sleeping bag for the traveller or hiker wanting a bag that will get them through most non-extreme conditions.

  • Breathable 2D PermaShell™ fabric
  • Tapered rectangular design
  • Oversized internal zippered pocket
  • Lightweight Ultra-Sil® compression bag, mesh storage cell and laundry bag included
Snowys Code:
Supplier Code:
Comfort Temp. Rating:
-1 °C
Lower Temp. Limit:
-8 °C
Tapered Rectangular
Fill Ratio Top/Bottom:
60 / 40
Max. User Height:
183 cm
Internal Girth:
152 cm Chest | 146 cm Hip | 102 cm Foot
External Dimensions:
203L x 68W x 5H cm
Packed Dimensions:
36L x 15W x 15H cm
Compressed Volume:
6.0 L
2D PermaShell™ 33D Nylon with DWR
Fill Material:
650+ Loft Ultra Dry™ Premium Duck Down
Fill Weight:
500 g
Soft Touch Nylon
Zip Draft Tube:
With Anti-Snag
Neck Draft Tube:
Dual YKK #5
0.980 Kg
Suggested Use:
Trekking | Camping
Limited Lifetime
4.0 2
5 stars
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1 star
Aug 21 2017

Quality bag

Lovely bag, although in hindsight I wish I had gone with a mummy style of bag for extra warmth as I feel the cold up around my torso with this bag where it is very roomy. I don't think Adam's review is all that fair, as the issue relates to down bags in general. I found the bottom of my bag was quite damp one morning from tent condensation, but I didn't actually notice it through the night. In any case, I have solved this issue by tucking the end of the bag into my Patagonia rain pants. A hardshell jacket would also work. I used this bag up at Baw Baw when it was -6 with very strong wind and snow all night. My lower half stayed pretty toasty, slight chill up around torso wearing 4 layers. Moisture could be an issue with longer trips with this bag as you want to let it dry it out after damp and cold nights.

- Noble Park
Jun 19 2017

Condensation problem

I recently got this bag from a local store (not Snow's) but thought I'd share my experience with it anyway. I'm 193cm tall and have the large version. I've used it on two trips so far. The first was in NSW where the temperature got down to - 4 C overnight. After the first night, the bag was wet at the feet and STUNK horribly of something like mould. Because it got wet, it didn't stay warm and I kept waking up all night from the cold. It wasn't warm enough the next two days for the bag to fully dry, so the issue repeated twice more. It didn't rain for the entire trip, so I can only assume that the moisture was due to the bag touching the inside of the tent. This is my first experience with a down bag, but I find this to be a serious design flaw, as it's unavoidable for the bag to touch the tent inner given my height. My second trip was in SW Western Australia where the temperature dropped to 5 C overnight. Considerably warmer. No frost on the ground or tent in the morning. Yet... Exact same problem. Also, after airing and drying the bag out between trips, the smell did not fully fade. Now after getting back from the second trip, I'm considering returning the bag as I consider it to be either faulty or just poorly designed. Putting my feet inside a waterproof jacket or similar seems kind of ridiculous when you're using a $400 sleeping bag.

- Perth
Response from Snowys Jun 20 2017

Hi Adam, sorry to hear that you are having troubles staying warm in your sleeping bag. The Trek range fro Sea To Summit have been tried and tested for a number of years and have recently undergone a facelift with no design changes. We, at Snowys, are confident in the performance of these sleeping bags. Firstly, the smell you experience is most likely due to the down getting wet, this is pretty normal, and can be fixed with washing. However, you don't really want this down to be getting wet as all insulation properties are then lost. My first thoughts are as you mentioned, that the condensation inside your tent is wetting your bag as your feet touch the walls, which s not something you want with a down bag. Condensation is somewhat unavoidable in certain situations, the best way to minimise it is with ventilation. Check out our blog article on tent condensation for more info. I'm not sure what else to recommend sorry. The exterior of the Trek bag is not waterproof but is water repellant, so there must be a significant amount of water coming from somewhere to wet through the fabric. It is highly unlikely that this is due to poor design based on other user experience, if you feel there may be a fault I'd recommend taking it back to the place of purchase for inspection, but my gut feeling is that given the problem is restricted to your feet, the issue lies around your feet touching the end of your tent. I Hope this helps ~ Ben.

What is the compressed size1 answer

I notice on your web site the packed size (compression bag) for the regular size is 36x15 while on another suppliers site, what looks to be the same sleeping bag is listed as 26x17 packed size. I’m hoping for a compact bag and wonder, Could there be an error In your listed details? Thanks

- Albany(4 weeks ago)

G'day Liz,

Sorry for any confusion we've created with our packed measurements on the Sea to Summit Trek TkII. The packed dimensions we show are how they come to us from the factory, which isn't in a compressed state. I've just tried to recreate the 26 x 17cm dimensions that you found on another website. If I really compressed the bag as much as I could in the compression bag, then it turned out to be about the 26 x 17cm, I was hoping for. With bags like this, the dimensions always depend on how much you compress them, so you should definitely be able to get it that small. 

- Snowys(4 weeks ago)

Size change?1 answer

On Sea to Summit's own Feature Matrix it gives the width of the Trek11 regular as hip 150 and your details has it at 146. Is the orange version a different size?

- Selby(11 months ago)

Howdy Diana,

The orange is the new version of the Trek TkII Sleeping Bag as they recently changed their line. This bag may feature a slightly different girth to the older model with the black on the outside. If you did see this bag as the orange version with 150mm on the Sea to Summit web page I would suggest that figure would be correct.

- Snowys(11 months ago)

Whats the difference between the old and new model?1 answer

Hi there, saw that there's 2 versions of S2S Trek sleeping bag. Any difference between the two?

- Melbourne(1 year ago)

G'day Danny, 

I've got the 2017 Sea to Summit Catalogue in front of me right now, and it seems that they've just given the trek range a facelift in terms of colour, and it now comes in a women's and wide fit size. 

- Snowys(1 year ago)
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