Pack the ultra comfortable, super luxurious dual purpose Thermarest Ventana Duo Sleeping Bag and go solo or cuddle up with a partner on your next lake loop overnight or festival weekend.The Ventana is designed to be a practical, value packed single, and the included zip in mattress coupler also turns it into a soft, draft free cocoon of luxury for two. Advanced eraLoft synthetic insulation retains loft and warmth even in wet conditions. Use as a bag or unzip completely flat for use as a two person quilt. Included, zip in mattress coupler creates a soft, draft free cocoon of luxury for two with a sheet to sleep on and two sleeves that mate 25in x 77in 63cm x 196cm mattresses up to 3in 7.6cm thick. ThermaCapture seams help retain radiant heat for added warmth 40F 4C is the lowest recommended temperature for usage. eraLofthollow microfiber polyester retains loft and warmtheven when wet. Rated to 50F 10C degrees. Import.