The Ultra Light is a +20 degree F (approximately 0 degrees C) rated mummy style bag.

When the over bag is added to the Ultra Light the temperature rating becomes -20 degrees F (approximately -30 degrees C). When both bags are combined you have the Ultra Light FRTSS.

Note:
Wiggy's inc. is trying to eliminate the Woodland Camo color from our inventory. From time to time we will find small quantities of product made in the Wood. Camo color. Until all has been discovered we will continue offering different sizes as we find them...