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