Wrap the Masterbuilt 40 Smoker Blanket around your smoker and it holds in the heat so you can slow smoke your favorite foods all winter long. Acts as insulation, so you can maintain a consistent cooking temperature. Fits any Masterbuilt Digital Smokers with these approximate dimensions: 38H x 23W x 17D. Recommended for use when outdoor temperatures are 50F or below. Imported. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Smoker Accessories.