Case of 100. These High Heat Oven Bags are made out of heat resistant nylon and are intended for single use. Guaranteed to keep your meat juicy these oven bags seal in steam, locking in the moisture, and allowing the meat to baste itself giving you the best results. They are also completely oven, microwave, slow cooker, steamer, and freezer to oven safe. Saving cooking and cleaning time these bags are perfect for baking your next meal.