Sleeping bags are designed to provide insulation, warmth, and cushioning for comfort on hard surfaces. It is a common accessory for family campouts or for backpacking trips. The amount of warmth and comfort offered by a particular sleeping bag is determined by the fabric and fill. While there are several insulating materials used for sleeping bags, the most popular are synthetic materials, down, cotton, and wool. The advantages of synthetic fill include the ability to resist water absorption, firmness, and resilience. Down, on the other hand, is better at retaining heat, and it is lighter than synthetic material. Also, down is more expensive and must be kept dry. Likewise, wool and cotton have advantages and disadvantages. For instance, wool is a water repellent, but is heavier than other materials. While cotton has significant weight and retains water, it is the most economical fill of all. The best choice in sleeping bags is determined mainly by the intended use. For camping within the confines of a secure tent, the cotton sleeping bag can be adequate. On the other hand, camping out on the ground where moisture is an issue will require one of the designs that repels water. Sleeping bags come in a variety of designs in addition to the traditional adult rectangular bag. The mummy sleeping bag has a hood that can be zipped for complete coverage. Hooded rectangular sleeping bags provide extra support and warmth for the head without total closure. Kids and youth size sleeping bags are available in a variety of colors and designs to keep the little camper happy.
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