Sea to Summit Trek TK II


spring 2010 short regular long
Weight 2 lb 3 oz / 1000 g 2 lb 4 oz / 1020 g 2 lb 7 oz / 1110 g
Fill weight 1 lb 2 oz / 500 g 1 lb 2 oz / 500 g 1 lb 3 oz / 550 g
EN comfort 30 F / -1 C
EN lower limit 18 F / -8 C
EN extreme -13 F / -25 C
Fill 650-fill duck down
Shape Semi-rectangular
Max user height 5 ft 7 in / 170 cm 6 ft 0 in / 185 cm 6 ft 8 in / 205 cm
Shoulder girth 59 in / 150 cm 60 in / 152 cm 61 in / 156 cm
Hip girth 58 in / 148 cm 59 in / 150 cm 60 in / 152 cm
Foot girth 39 in / 100 cm 40 in / 101 cm 40 in / 102 cm

Manufacturer's Description

Visit Sea to Summit's Trek TK II page.

Retailers' Descriptions

Here's what other sites are saying:

This lightweight 3-season bag has a roomy semirectangular shape and high-loft water-resistant down insulation for excellent warmth and compressibility.


Incorporating their 2D PermaShell fabric and a premium 650 loft down, Sea to Summit Trek bags are a refined classic. The 60/40 fill ratio in the Trek bags is maintained using a side block baffle and differential cut shell. In the top of the shell a 3D side wall, a feature normally reserved for technical alpine sleeping bags, provides more space for the down to loft right to the edge of the bag.An oversized security pocket located inside the bag is easily accessible, ideal for stashing passports and other valuables while travelling. The soft touch lining fabric is down proof by construction and highly breathable offering a comfortable sleep.The tapered rectangular design offers a good compromise between the comfort of a generous cut shape and warmth of a closer fit. A full length side and foot zip allow the Trek series to be opened out into a full duvet for use indoors and warm weather.


Built for those who like a little extra wiggle room but still want to stay cozy, the Sea to Summit Trek TkII features a semirectangular shape to give you the best of both worlds. This versatile sleeping bag is a great choice for everything from weekend backpacking trips to month-long globe-trotting excursions.. . . . Tapered rectangular cut offers a good compromise between the comfort of a rectangular bag and the warmth of a mummy bag. 650+ Fill Power Premium European duck down is a high quality insulation treated with ULTRA-DRY Down~ ULTRA-DRY Down treatment is a permanent nano-level water repellent polymer that vastly improves the down's reaction to water without affecting its weight or loft performance~ ULTRA-DRY also inhibits bacterial and microbial growth, making the bag more hygienic and long-lasting~ Treated down retains over 60% more loft, absorbs 30% less moisture, and dries 60% faster compared to untreated down. Highly vapor-permeable 2D PermaShell fabric is a high-density weave 33D nylon with a DWR finish. High-density weave 40D nylon lining is engineered for comfort, using a high thread count to create a soft surface and silky hand feel. Differential cut shell and lining helps the down loft correctly for superior thermal efficiency. Offset baffle construction provides a stable structure that allows the down to loft to the right density and minimizes loss of heat through seams. Two-dimensional hood easily cinches into a form-fitted profile using the dual-adjustment drawcord to seal in the warmth. YKK #5 reverse zipper allows you to unzip the bag from top and bottom for better temperature regulation.


Your summer treks just got a heck of a lot easier, comfier, and more fun with Sea To Summit's Trek Tk II Sleeping Bag. Pairing ULTRA-DRYDown with a breathable liner and some convenient storage turns this bag into one that you'll want on every one of your summer escapades. Easy to pack, store, and rest in, you'll have a pretty hard time finding a spot that you won't love resting in your Trek Tk II Sleeping Bag. PRODUCT FEATURES: Down: ULTRA-DRYDown 650+ Loft 85% Down Cluster Premium Duck Down Compressed Size: 6 liter Fill Weight: 19.4 oz/550 g Bag Weight: 2 lb 7 oz/1110g Season ratings: Indoor/Summer Temp Rating: 18 F (EN Lower Limit)/-8 C (EN Lower Limit) Shell material is highly vapor permeable and downproof Lining is a breathable, durable 40-denier nylon fabric with a soft touch Full-length side zipper and foot zipper allow bag to be converted from traditional sleeping bag to a duvet/down comforter Semirectangular shape provides more room than a mummy bag for a more comfortable sleeping bag while maintaining thermal efficiency Differentially cut inner layer is smaller than the outer layer to create a consistent thickness of insulation that precludes cold spots Oversize draft tube backing the 2-way zipper keeps the warmth in and the cold out; zipper is backed by stiff, antisnag tape for smooth operation Large interior secuity pocket is great for stowing a few essentials, alleviating middle-of-the-night fumbling Baffle construction allows the goose down to remain fully lofted and keeps it from shifting

- Appalachian Outdoors