The North Face Basalt 40/4 Sleeping Bag is a warm weather sleeping bag for late spring and early summer hiking and camping. The insulation is hybrid, with 550-fill water-resistant ProDown as well as Heatseeker Eco synthetic. The combination provides warmth and water-resistance in wet weather. The synthetic is on the bottom of the bag to resist compression while the ProDown will be on the top. The zipper wraps around the footbox, allowing the bag to open full and used as a blanket. The Basalt packs into an 8”x13” stuff sack so you can jam it into your backpack and be on your way in the morning.
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