The SOLAR OVEN BAG is built to be highly portable, it folds into a bag to carry and store your cookware. The Solar Oven Bag can reach temperatures of up to 285 degrees Fahrenheit. Temperature will vary depending on season, location, and amount of sunlight. The solar oven will cook slowly like a slow cooker. It can be used for survival, emergency, camping, hiking, and to save on energy cost. A UV index of 4+ is best for solar cooking.