The perfect feature-packed, value oriented synthetic bag for weekend warriors and new campers, Sea to Summit's Trailhead™ is no slouch when it comes to performance. It's tapered rectangular shape provides more space and comfort than a traditional mummy bag while the full-length side and foot zip allows the bag to be opened out and used as a quilt. A second zip slider in the footbox provides extra ventilation and versatile temperature adjustment. 30D DWR Nylon shell and 20D Nylon lining are lightweight and very compressible fabrics WaveLoft™ construction for extra warmth and loft Lining fabrics attached to shell prevents tangles Oversized zip draft tubes with anti-snag Full length 5 YKK zip allows bag to open out flat and be used as a quilt Shell: 100% Nylon, Lining: 100% Nylon, Primary Filling Material: 100% Polyester, Stuffsack: 100% Nylon excluding Trims Tapered rectangular shape for more space and comfort than a traditional mummy bag Second zip slider in footbox for versatile ventilation Includes stuff sack