The Robens Spire I Sleeping Bag has been constructed with a body contour profile for an optimum warmth to weight ratio. Designed for two season use, it features a 3D hood profile and redefined neck baffle position to keep warmth in and draughts out, while a shark fin foot box offers extra insulation to where it is needed most. Additionally, a brushed lining lends high moisture transport for comfort and an inside pocket lets you keep valuables close at hand.