The tog is a unit of thermal insulation used primarily in the textile and bedding industries. It measures the thermal resistance of materials, particularly duvets and quilts, indicating how warm the bedding will keep a person during sleep. The tog rating usually ranges from about 1 to 15, with lower tog values (1-4) indicating lighter and cooler bedding suitable for warmer weather, while higher tog values (10-15) indicate warmer bedding for colder conditions.
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