The Atom’s ultra-light design and our highest quality down have given it cult status among alpinists as a bivvy bag on extreme climbs, but its comfortable, silky fabric make it a great bag for warm-weather bivvies on casual summer road trips as well.

Features
• Classic trapezoidal foot box for more foot room
• Full-length zipper
• Hood draw cord positioned for easy access
• Insulated draft tube eliminates cold leaks through the zipper
• Stretch tricot baffles at hood and foot box
• Stuff and storage sack included.
• Velcro®-free face muff keeps the drawcord and zipper away from your face
• Zipper guards help repel biting zipper coils
• Filled and finished in Santa Rosa, California
• Certified 850+ Fill Goose Down. The best weight to warmth down in the market; independently tested and certified by International Down and Feather Laboratory in Salt Lake City, Utah. Retested at fill time in Santa Rosa to ensure 850+ fill power every time. If the down does not meet our in-house test, we send it back.
• EN Tested
• Sewn-through baffles makes the overall weight lighter
• Nautilus 6-baffle hood: 6 chambers of down around head for better down control and fit, hood cord is positioned for easy access