Rab Neutrino 600XL Sleeping Bag - Fiery Red XL Left Zip Pertex technology Microlight inner and outer fabric, 800FP European Duck Down, Rab technology fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax technology Proportionally assigned differential cut mummy taper shape Internal YKK 3 coil zipped stash pocket, 3/4 length YKK 5 coil main zip (left hand zip only), & anti-snag zipper webbing tape Internal collar and hood drawcord,iImproved close fitting neck baffle design, trapezoidal baffle chamber design, angled foot box, compression stuff sack, & cotton storage sack Temperature tested to new European standard EN13537: 2012. Comfort: -2 deg C, Limit of Comfort: -8 deg C, Extreme: -26 deg C