New for 2016 the therm a rest corus hd quilt regular is the lightest down blanket that offers a staggering performance and unbeatable comfort thanks to the use of nikwax hydrophobic down making it ideal when you need to keep your weight to a minimum but still want some luxury on your next adventure the corus is gram for gram the warmest in the therm a rest quilt range and it has achieved this in several ways firstly by incorporating a nikwax hydrophobic down hd fill secondly by introducing therm