DESIGN & DETAILS: Relaxed spoon shape for comfortable side sleeping Insulation is designed with synthetic Stratofiber(TM) fill that offers a blend of warmth, moisture resistance, and packed volume Blanket Fold(TM) external draft collar that provides tucked-in comfort and temperature regulation Pillow pocket allows space to stuff a jacket, extra clothes, or NEMO Fillo(TM) to create a handy pillow on the go Zipper plow hardware for a snagless zip Zippered stash pocket keeps your phone and other essentials warm and within reach Opposite-sided zippers on Tempo men's and women's models let you zip two bags together to create a double sleeping bag