The Pac-Tec 150 sleeping bag is lightweight and compact. Its outer shell rip stop wind and water resistant polyester makes it a good choice for travelling light. This high specification softshell bag has nearly as high warmth to weight ratio as down bags, while keeping the advantage of retaining warmth in damper weather. Shell: 210T rip stop polyester Lining: 240T microfiber soft polyester Filling: 150g/m 3D micro polyester.