The standard mummy profile of the Serac 600 Short Sleeping Bag and a choice of down fill weight in a box wall construction provides the best warmth to weight ratios for most general outdoor pursuits. It is very compressible thanks to the quality down filling, making for a small pack size, and comes with a compression stuff sack and mesh storage sack for optimal storage condition on tour and at home. The redefined neck baffle position and profile minimises draughts and heat loss for comfortable, peaceful sleeping. With a loft expander system to increase insulation in the upper and bottom half of the bag, where you need it most.