draft tube
(noun)
draft tube (noun) — An insulated flap on sleeping bags that runs along (and behind) the length of its zipper.
An insulated flap on sleeping bags that runs along (and behind) the length of its zipper. This feature helps contain warm air and prevents ingress from cold air when the bag’s occupant moves.
Frequently Asked Questions
What is draft tube?
An insulated flap on sleeping bags that runs along (and behind) the length of its zipper. This feature helps contain warm air and prevents ingress from cold air when the bag’s occupant moves.
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