Sea to Summit Trek TK I


spring 2011 regular long
Weight 1 lb 13 oz / 830 g 2 lb 2 oz / 970 g
Fill weight 12 oz / 350 g 14 oz / 400 g
EN comfort 41 F / 5 C
EN lower limit 32 F / 0 C
EN extreme 5 F / -15 C
Fill 650-fill duck down
Shape Semi-rectangular
Max user height 6 ft 0 in / 180 cm 6 ft 8 in / 200 cm
Shoulder girth 60 in / 152 cm 61 in / 156 cm
Hip girth 59 in / 150 cm 60 in / 152 cm
Foot girth 40 in / 101 cm 40 in / 102 cm

Where to Buy

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Manufacturer's Description

Visit Sea to Summit's Trek TK I page.

Retailers' Descriptions

Here's what other sites are saying:

Insulated with water-resistant down for warmth and compressibility, the lightweight Sea to Summit Trek Tk I sleeping bag has a semirectangular shape for a little extra room to move while you snooze.


Sea to Summit Backpacking Sleeping Bags Trek Tk I Sleeping Bag (650 Down)-Regular-Left-Orange 041RWL. 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.


You've always wondered why some of your backpacking buddies would choose to suffer in the frigid temperatures that inhabit autumn and spring. But you, you're different--you're more of a fair-weather backpacker, in that you choose to backpack when the weather is fair. That's why you opt for Sea to Summit's Trek TkI Sleeping Bag, a bright bundle of joy that's light on your back and warm throughout summer's standard temperatures. Despite being one of Sea to Summit's many minimalist-minded options for trekkers who'd rather have less weight than more features, the Trek TkI still stuns you with innovations like the Ultra-DryDown treatment which helps bag's down insulation retain its lofty warmth when you camp in moisture-riddled climates.


The Sea to Summit Trek TKI Sleeping Bag is a summer sleeping bag for camping, hiking, and sleeping in the fort you made with your kids. The 2D PermaShell Features a durable water repellent treatment for water resistance, and is durable for all the summer time sleeping activities. The bag weighs in at only 1 pound, 13 ounces (regular length), making it easy to pack into your backpack with the included lightweight Ultra-Sil compression sack. The 650+ ULTRA-DRY down is treated for water resistance as well, take that summer rains! The tapered rectangular shape allows for plenty of space and comfort, so roll around and get some shut eye. Features of the Sea to Summit Trek TKI Sleeping Bag ULTRA-DRYDown 650+ Loft 85Adeg Down Cluster Premium Duck Down Length / zip options: Regular - left or right zip Long - left zip Season ratings: Indoor/Summer

- Moosejaw