High-Tech Tenting

L.L.Bean’s New Sleeping Bag Uses Insulation Originally Developed for NASA

February 6, 2018 Briefings By

L.L.Bean’s latest sleeping bag, the Ultralight, is (as its very straightforward name suggests) built for lightweight hiking and camping. The Ultralight comes in 20- and 35-degree models and is equipped with handy features including a small stash pocket and an extra-roomy footbox, but the real innovation is the bag’s insulation. The Ultralight uses PrimaLoft Gold with Cross-Core technology, an insulation developed for NASA that uses aerogel to increase warmth substantially without adding to the sleeping bag’s overall weight.


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