SolarWear Oven Heating Bag - Create full surrounding oven heat with this 100% cotton black Jersey knit 11"x11.5" heating bag with removable pouch filled with heat-retaining beans to preheat in your microwave/conventional oven, or in solar oven prior to use. Remove pouch to wash. Has a convenient sturdy handle to safely carry heating bag to and from your solar oven. Place on solar oven floor below leveler to create the full surrounding oven heat that's great for sous-vide cooking. Place directly under large casseroles or pots to shorten cooking times. Shipping and Handling included in price.