Designed by Mountain Hardwear for the woman who's ready to do more backpacking, this ultra-warm synthetic bag is filled with Thermal Q® insulation and sports vertically welded Lamina™ construction on top to maximize loft and eliminate cold spots where you need it most. Roomy mummy cut can be mated to a second bag using the full-length zipper.
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Thermal Q®
Thermal.Q® is warmer because it's designed to mimic the structure of goose down - rigid stems that form a matrix of gaps and softer fibers to fill those gaps. Thermal.Q® uses stiffer fibers to create a unique 3D grid structure and finer fibers to fill in the gaps the structure creates. The result is a warmer synthetic whose structure gives it better compression rebound.