Quite simply put, down is the lightest, warmest insulation you can get. The lighter it is, the loftier it is, which makes it warmer for less weight.
To insure the highest quality down, Red Fox only works with suppliers who adhere to the highest standards of down harvesting - no live plucking.
The loftier the down, the higher the fill power rating.
Baffled construction insures the thickest layer of down possible, as much as 120mm (>5") with our Top Series.
How thick the baffles are determine the temperature range. For most conditions you want to select a bag with a comfort range around the temperatures you expect. With good ground insulation most people will still be comfortable at the Tlimit rating wearing a light baselayer. Our extreme rating (Textreme) would only be useful if you wore extra layers inside the bag. YMMV.
Down Sleeping Bag Features:
Full-length draft tubes & neck collars.
Pillow pocket on Rapid sleeping bags
Yeti, Rapid, and Top Series use baffled construction.
Mummy or Semi-Rectangular shapes available. (SR for Arctic or Yeti series only)