The Thermarest Apogee Quilt partners with your mattress to create a sleep system offering excellent freedom of movement and temperature regulation in temperatures as low as 40F 4C. eraLoftsynthetic insulation offers warmth and loft that performs in all weather conditions. A shaped, elastic footbox and full length draft tubes create a secure connection with your mattress and prevent drafts. The included loop kit allows your blanket and mattress to function as one cozy cocoon of comfort throughout the night. Hollow microfiber polyester eraLoftis lightweight, compact and retains warmth even when damp. ThermaCapture seams help retain radiant heat for added warmth. Full perimeter side baffles for draft protection. Elasticized, insulated footbox keeps feet warm and keeps your quilt in place. Perimeter snap loops mate with another Therm a Rest quilt, blanket, sheet or Mattress Snap Kit sold separately Includes external snap pocket, stuff sack and compartmental storage sack. Perimeter snap loops and included loop kit mate with another Therm a Rest mattress, quilt, sleeping bag, blanket or sheet. Import.