Tapered-rectangular mummy shaped bag with room to move around in. The dual zip allows you to vent at the bottom or you can open it up fully to use as a comfortor. The bag has a shaped hood and draft tube along the zipper, plus an internal pocket for your phone or valuables. If you have a Sea to Summit Altitude, Journey or Venture bag the Trek will zip to it to form a double sleeping bag.

Ultra-Sil compression bag and a storage cell included.

Insulation: 650 ULTRA-DRY down
Warmth rating:  -1C  
Weight: 760 g (Reg), 850 g (Long)
Max user height: 183 cm (Reg), 198 cm (Long)