The Klondike is a heavy-duty oversized hooded rectangle bag. The Klondike uses TechLoft Silver insulation, which consists of multi-hole staple-length micro-denier fibers that have a siliconized finish for maximum insulation, loft, and compactness. The TechLoft Silver insulation will keep you warm and toasty on those colder nights when you'd prefer to have more "wiggle room" than you get with your mummy bag. It uses a two-layer offset construction to eliminate cold spots. For transporting, we include webbing straps with quick-release buckles that keep your "rolled-up bag" secure. 4893918 Klondike -30deg 4900027 Rectangle Liner - PolyCotton 4900029 Rectangle Liner - Brushed Polyester