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Sea to summit Trek TK I Sleeping Bag

Sea to summit Trek TK I Sleeping Bag

Sea to summit

Sea To Summit Trek TK I Sleeping Bag

Product description Sea to summit Trek TK I Sleeping Bag

Traditional comfort and value, with an anything but traditional design approach, our Trek™ Series sleeping bags are what we grab for globe-trotting adventures on a budget. Vertical baffles over the chest section ensure the down insulation cannot migrate or shift to the outside of the bag during sleep, creating cold spots. A side block baffle construction maintains the 60/40 fill ratio, keeping more down on the top of the bag for maximum insulation.

- Lightweight fabrics reduce weight and packed bulk while the two-way #5 YKK full length side zip and separate foot zip, allows the bag to open out completely and double as a quilt. The foot zip is perfect for extra ventilation or to provide freedom of movement for your feet.

- The 3D side-wall baffle ensures that down can loft to the very edge of the bag, maximising insulation, while the panelled hood draws in tight when needed or lies flat for use in warmer weather. The oversized zipper draft tube uses anti-snag materials to prevent the zipper catching and the soft-touch 20D lining fabric is highly breathable yet also down proof.

- Completing the thoughtful design features of this classic down bag, we have included a large internal security pocket, perfect for keeping valuables close or batteries warm.


- Tapered rectangular for more space and comfort than a traditional mummy bag
- RDS 650+ Loft ULTRA-DRY Down™ offers excellent insulation and compressibility
- Lightweight fabrics for reduced weight and bulk
- Vertical chest baffles prevent down migration and cold spots
- Two-way #5 YKK side and separate foot zip allows bag to double as a quilt and provides extra ventilation options
- Oversized zip draft tube with anti-snag materials
- Large internal security pocket
- 3D side-wall baffle maximises down insulation right to the edge of the bag
- 3D hood draws in tight when needed
- Trek Tk3 has additional neck collar draft tube to seal and trap in all your warmth
- Soft touch 20D lining fabric is lightweight and highly breathable, durable 30D Nylon shell
- Includes Ultra-Sil™ Compression Bag for compact storage
- Zip Coupling: This bag is designed to pair with many Sea to Summit Women’s sleeping bags


- Insulation Type: Down
- Down: RDS 90/10 Premium Down
- Fabric: 30D Nylon shell
- Fill Power: ULTRA-DRY Down® 650+ Loft
- Fill Weight: Regular: 350g, Long: 400g
- Shape: Tapered Rectangle
- Temp Rating: EN 5°c Comfort to -1°c Lower
- Weight: Regular: 760g, Long: 850g


- Loft is the volume for a given weight of down. It is used to describe the quality of down, relating directly to the insulating performance. High loft down is warmer for a given weight than low loft down. Higher lofting down will fill a larger volume of space for a given weight. As a result, less down weight is required to fill each baffle in a sleeping bag. This translates to a lighter sleeping bag. The most common measure of loft is called Fill Power. 850 Fill Power implies that one ounce of this down will loft to fill a volume of 850in3.

650+ Loft Premium Down:
- In the Sea to Summit Trek range, 650+Fill Power Premium duck down is a high quality insulation that sets the benchmark for sleeping bags in this class.

Sea to summit Trek TK I Sleeping Bag is perfect to complete your outdoor gear. In our online store trekkinn, you can profit from the multitude of advantages and if you place your order right away at trekkinn, you will receive it in a few days at home. In addition, in our online outdoor store you can find other outdoor products that complement Sea to summit Trek TK I Sleeping Bag.

Features Sea to summit Trek TK I Sleeping Bag

Comfort Limit
5 to -5 °C
Insulated down

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Sea to summit Trek TK I Sleeping Bag

Smart choice!


One of the best cost/benefit ratio in this temperature range!

Sea to summit Trek TK I Sleeping Bag

Sleeping bag


The sleeping bag is just amazing. Thank you very much, such a nice material, comfortable. And most importantly, light and warm.

Sea to summit Trek TK I Sleeping Bag

Great product


Lightweight and compressible sleeping bag great for three seasons use. The internal fabric is very pleasant to the touch and the dimensions are adequate (I took the regular version) to ensure absolute comfort both in the shoulder area and in the feet. It is equipped with a bag suitable for stowage during periods of non-use and a compressible bag which considerably reduces its volume. Fantastic zipper that never jams. Highly recommended!

Sea to summit Trek TK I Sleeping Bag

Very good and functional


Really good bag. Packed in a very small, warm, opens as a blanket. Loose storage bag. Absolutely great bikepacking for the hustle and bustle.

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