SLEEPING BAGS From our F10 Series Vulcan -17 through to the Nitestar 250, our sleeping bags have been tested and developed to allow you to MAKE MORE OF YOUR SLUMBER. Expert knowledge through 50 years of design and development have led to our strongest collection yet with key technologies to increase warmth without affecting pack size. Look out for our Thermal-Reverb which reflects heat back to the user, Thermal Embrace to hug the body while allowing movement and our advanced constructions to add warmth. All of our sleeping bags are independently tested by Aitex to ensure our temperature ratings are accurate allowing you to make an informed choice when selecting a bag for your needs.