The PLUTON UL 40 850 DOWNTEK REGULAR sleeping bag by BIG AGNES is incredibly ingenious. Its minimalist design makes it super light and compact, so much so that you wonder if it fits in your bag.

The sarcophagus shape and small flat hood provide comfort and warmth when needed. The DownTekTM 850 cuin duck down fill is lightweight and naturally water repellent to maintain its thermal qualities. With a comfort temperature limit of 4C, it is an excellent down for summer bivouacs or overnight stays in a refuge.

The outer fabric enveloping the insulation is highly technical, made of Pertex Quantum nylon rip-stop with a water repellent treatment to withstand pink or light rain.

Finally, for ease of use, the designers designed a full-length, two-way zipper so you can regulate your heat as you see fit.