text: Truly the best of both worlds, this bag can go from a 15 degree bag to a 30 degree bag in the blink of the eye There is a removable Dual Temp down torso panel that allows for a quick change if the temp changes The panel also makes a great pillow The Pyro Maniac sleeping bag has all the bells and whistles without sacrificing weight
  
  By mapping the body's warmest and coolest parts, Sierra Designs' Core Comfort Technology places sleeping bag and apparel insulation where it's needed most - directly over the torso - to maximize heat retention for warmth without bulk CCT apparel cools through non-insulated areas during high exertion activities and retains heat during times of low exertion while CCT sleeping bags require less insulation to keep users warm overnight