Before you venture off trail for that perfect place a few thousand feet up and secluded from modern civilization, you will want to take the ultra-lightweight Marmot Plasma 15 sleeping bag with you. Jam-packed with Certified 900+ Fill-Power Goose Down, EN tested (EN13537), with a 15F rating (hence the name), the Marmot Plasma 15 sleeping bag should keep you warm and comfy when the nasty wind and cold comes.