EMS Boreal 20
Here's what other sites are saying:
Our best-selling 20 bag has new colors for '06. The Boreal 20 still delivers incredible technical and thermal efficiency with Polarguard Delta insulation and innovative construction that achieves temperature rating with reduced weight. Thermally tested at Kansas State University's testing facility for optimal design and insulative properties. Polarguard Delta insulation features hollow fibers with large voids that offer great heat retention and compressibility. Continuous insulation fibers resist matting and clumping; no cold spots; insulates even if wet. Aflex construction allows us to use less insulation to achieve the same temperature and thus reduce weight. Pertex Microlight shell fabric is windproof and very lightweight; surface moisture beads up and runs off. Ground-level zipper and insulated zipper draft tube keeps warmth inside. Adjustable hood. Nylon stuff sack.