The Sea to Summit Trek 18 Sleeping Bag is a great mid-range bag. It's warm enough for 3 season use, lightweight but not obsessively so, and roomy enough for natural sleep positioning. The Trek provides overall excellence in a versatile down sleeping bag.

30D Nylon Shell

Ultra-Dry Down 650+ Loft

Responsible Down Standard Certified

Compressed Volume, Long – 7.3L

Compressed Volume, Regular – 6.1L

Compressed Volume, Regular Wide – 7.4L

Shape – More room between hips and knees to allow you to sleep in a natural position without compressing the down insulation and creating cold spots.

Zip Coupling – A 65 inch #5 YKK full-length zip allows a unisex left-handed and women's specific right-handed bag to pair together. Designed to pair side by side, each person sleeps in their own bag enabling each of you to take advantage of your bag's unique insulation zones, hood and footbox features - perfect for cozy adventures for two.

Shaped Hood

Oversized Zipper Draft Tube

Internal Zipper Pocket

Forms a Snug Double Sleeping Bag by Zipping to Any Altitude, Journey or Venture Sea to Summit Bag

Includes Lightweight Ultra-Sil Compression Bag and Storage Cell

3 Season Rating – 15°F (comfort range 15°F to 60°F)