Tom Horsman reviews the Woolly Bully and is impressed

The revolutionary grill accessory that turns the world’s favorite grill into a high-performance, high-efficiency outdoor cooking machine.

• Compatibility: Compatible with 22" or 26" Weber® Original, Premium, and Master-Touch grills sold after 2015. Will it fit my grill?
• Advanced Fabrics: A layer of aerospace-grade insulation, sandwiched between welding blanket on the bottom and marine-grade outdoor fabric on the top
• Improved Efficiency: Reduce charcoal consumption by one-third, extending time between refills and minimizing the white smoke periods
• Consistent Cooks: Hold stable temperatures for hours, retaining more moisture and achieving more even doneness across your meat
• Higher Heat: Replicate brick-oven cooking, with less heat loss through the lid, and more radiating back onto your food
• All-Weather Performance: Extend the grilling season throughout the year with precise temperature control through rain, wind, and snow
• True to an American Icon: Created by Weber kettle lovers who are committed to achieving the highest possible performance from the backyard classic
• Survivability: Heat-tested to 600°F