For cold nights or chilly sleepers, the Dragonfly offers a healthy helping of HeatSync insulation, a tricot-lined foot box for extra-warm feet, a draft tube to seal the zipper, and an ergonomic hood to seal in body heat. The included Sleep E-Z Pillow slots into its own pocket for comfort, while another pocket on the chest stores headlamps or other essentials. An interior clothes-warming pocket keeps items nearby for the morning and an attached stuff sack never gets lost.