Backpacker April '08 proclaims the Marmot Atom bag is ''sleep-anywhere evidence that luxury and lightweight can go hand in hand.'' FILL. 850-fill goose down. TEMPERATURE RATING (F). 40 degrees (F)

• One of the sweetest, lightest bags out there, this Marmot masterpiece is for fast, light summer trips.
• Lightforce nylon shell is lightweight yet strong; a Durable Water Repellent finish causes moisture to bead up and roll off
• Premium-quality 850-fill-power goose down is extremely compressible and offers an exceptional warmth-to-weight ratio
• Face muff allows hood to be cinched snug without digging into your face
• Down-insulated draft tube backs full-length zipper to keep the cold out
• Zipper guards prevent zipper snags; locking zippers keep bag from opening if you toss and turn at night
• Classic trapezoidal foot box lets your feet move freely and comfortably, and allows goose down to loft fully to keep your toes toasty warm
• Stuff sack and storage sack included