Super Spiral Stretch System (US. Patent NO. 7,900,301)
Multi-Tube
Construction with Flow Gate technology
Heat saving Tunnel Hood
Draw cord for face hole
adjustment
Neck Baffle: a shoulder collar minimizes air
circulation through the top of the bag
Dual insulated zipper draft
tubes
Auto Locking Zipper to limit zipper “slip” during
the night
67 in. mating right & left hand zippers
Tapered,
bias stretch stuff sack for easier packing included
Cotton
storage sack included
Super Spiral-Stretch System
MontBell has adapted a classic tailor's trick by integrating a woven
fabric "cut on the bias". By orienting the fabric's warp and weft threads
at 45 degrees to most major seam lines the sleeping bag becomes more
fluid or elastic in nature. Additionally, coiled or crimped fibers
are used in the fabric weave to capitalize on their inherent stretch
properties. To create an even more comfortable system MontBell utilizes
an elastic stitch technique to create small "gathers" in the quilting.
By combining this stretchy fabric, strategic seam orientation, and
the elasticized gathers MontBell offers unrivaled fit and comfort.
These innovations allow the sleeping bag to stretch with you as you
change positions throughout the night, drawing the insulation closer
to your body and eliminating drafty dead spaces. Keep body heat inside
your sleeping bag, where it belongs.
