The North Cascades can get rain any time of the year so be prepared with the Marmot EcoPro 15 filled with EcoPro 100 synthetic insulation you will stay warm even if the bag gets wet Using Upcycle technology the EcoPro 15 is made with recycled materials and because its built with Wave Construction it offers the advantages of both traditional blanket and shingle construction with no significant increases in bag weight Included with this 3season bag are both stuff and storage sacks