1. Design and Shape ​Shape: Fully rectangular, and this design offers ample space for movement while sleeping compared to narrow sleeping bags (mummy). ​Stitching: Longitudinal and transverse stitching (Quilting) to secure the internal filling and prevent it from clumping to one side, ensuring even heat distribution. ​2. Materials Used ​Outer Cover: An exterior fabric in a camel color (desert yellow), often made from ripstop Tanzanian material or treated cotton to withstand friction with the ground and gravel. ​Inner Lining: A soft fabric in an olive color, usually made from cotton or flannel to provide a warm and comfortable texture against the body without causing excessive sweating.