Map Terminal Salcopettes XLThe ideal pairing to our Thermal Jacket, when it comes to keeping you warm and dry in the harshest of conditions, we aimed high to create a salopette that is not only comfortable, but will exceed expectations thanks to PrimaLoft. Originally developed for the US Army, PrimaLoft insulation is a synthetic material that mimics the softness and insulation of natural down, consisting of ultra fine fibres that trap heat, even when wet. used extensively