The TETON Sports® Celsius XL Hybrid -18°C/0°F is roomy sleeping bag that keeps you warm, even below frozen temperatures. Cushioning around zipper and shoulder opening keeps drafts out. Brushed flannel lining offers an inviting, cozy texture. Innovative insulation provides better body heat retention. Convenient fold down top stays put with soft Velcro tabs. No-snag, self-repairing zipper opens on either side or bottom for ventilation. Connects easily to another bag for shared sleeping space.