The Andes Infinium 1000 is an expedition-grade down sleeping bag rated to -20F. It features 800-fill down treated with Nikwax hydrophobic finish for moisture resistance, combined with GORE-TEX Infinium fabric for breathability and wind- and water-resistance. Its TILT thermal lining reflects heat back to the body to reduce heat loss. The trapezoidal boxwall and differential cut enhance loft and warmth. The bag includes a waterproof stuff sack and a home storage sack.