The purist bag, OMM's Mountain Raid 100 is made lean, weighing merely 380g and delivering an exceptional warmth to weight ratio.  The base sheet is filled with Primaloft Gold 40g insulation with 60g on the top sheet and footbox to keep the feet and upper body warm; ideal for when out on an exposed mountainside. The loose laid outer shell and stitched inner also maximises insulation while eliminating cold areas.  A hood drawcord draws the bag close and with hanging loops at the base, simply hang it out to dry or air.