Warm Tradition Hot Water Bottle Covers are made using the best fleece material and are proudly crafted in the USA. Each cover fits snuggly around Warm Tradition"s standard size hot water bottle (7 inches wide x 12 inches high) and most other brand"s standard size hot water bottles. Covers help the heat last longer and are a great way of protecting your skin during use. All Warm Tradition hot water bottle covers are easily removable and machine washable. (Cold wash is recommended)