The Desert Pine series sleeping bags are made with Techloft insulation. Techloft Insulation consists of multi hole staple length micro denier fibers that have a siliconized finish for maximum insulation, loft, and compactness. The Desert Pine uses a 2 layer offset construction, sometimes called a bag within a bag. The contoured hood and mummy shape helps seal up your warmth and keep you warmer. The Desert Pine is a great backpacking sleeping bag to take along on your hikes that won't take up all the space in your pack.