The purist bag for the minimalist the shell is made from 22g pointzero and has a dwr treatment to the fabrics face to give it a degree of water repellency and also extra stain resistance the base sheet is filled with primaloft one 40g and then they have put the primaloft one 60g on the top sheet the footbox is also shaped and filled with primaloft one 60g to keep the feet warm offset 14 ykk zip allows access and ventilation at minimum weight the construction has also been considered as the