Mountain Hardwear 2nd DiMen'sion Sleeping Bag:
Warm up to the idea of spending nights on a breezy wall or frozen ridgeline with this 15ºF-rated 2nd Dimension Sleeping Bag. Mountain Hardwear recently enhanced the mummy cut and added a new Quantum Expander panel that you can unzip to increase the girth by eight inches. This means that you can loosen the fit up a bit on warmer evenings or add a bit of elbow room to stretch out your tired limbs while sleeping. A redesigned contoured hood and Face Gasket helps seal in the warmth while a draft collar keeps torso body heat in the spaces below your shoulders. Like other Quantum sleeping bags, the 2nd Dimension has Mountain Hardware's shingled construction, except this one is filled with fast-drying synthetic Polarguard® Delta insulation with over 5.5 inches of compressible loft. Polarguard® Delta has the same loft as Polarguard® 3D, but it's 10-15% lighter, so you carry less than similarly rated synthetic bags, but stay warmer throughout the night.