We're working out what we think - we'll add our view here!
Sierra Designs says:
Based on our bestselling Cloud, but now in a lower cost, fully recycled synthetic package, the Night Cap features a zipperless design with an integrated comforter for all the comforts of home in the backcountry. The Night Cap also incorporates our patented self-sealing foot vent and a pad sleeve, allowing increased ventilation for hot sleepers and movability for wiggle worms, side, and stomach sleepers.
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