| The Integral Designs Emperor uses a double sided locking
zipper with a hook and loop fastener at the top to keep bag from opening
during use. A
draft tube runs inside the zipper to help keep warm air in and cold air
out. |
|
An insulated draft collar with hook and loop fasteners
and an elastic drawstring can be cinched to minimized heat loss through
the neck opening. The drawstring for the neck opening is round elastic
cord, and the drawstring for the face opening is a flat ribbon. This
feature helps to facilitate identification of the different cords in
the dark . |