Like your own bed in the backcountry! Big Agnes' Doublewide Big Creek 30deg eliminates the need to zip two bags together so there's nothing keeping you apart from your cuddle bug in your tent, van, or wherever you need a super comfy bed. The much improved Big Creek 30 is insulated with FireLine ECO synthetic; a 100% post-consumer recycled insulation with lofty and compressible fibers that provide a cozy, warm sleep experience.