Pellon®’s Wrap-N-Zap® is a microwave safe product made of 100% Natural Cotton Batting. When used in the microwave, it will trap the moisture inside to produce a perfect baked potato or a well steamed ear of corn. It can even be used for warming rolls and tortillas. DO NOT USE THIS PRODUCT IN THE MICROWAVE WITHOUT FOOD. Washable by hand or machine. Dry cleanable. Please note: do not wash batting until covered in fabric / completed project. NOTE: When working with products intended for use in a microwave, certain precautions should be taken. Use only 100% Cotton batting, thread and fabric. Do not use batting that contains scrim. Do not use more than two layers of the batting, even at the seams. Wrap-N-Zap® is made of 100% Cotton fibers without any additives. It is not fire retardant or flame proof. For this reason, we suggest cooking in 1 minute intervals for a maximum of 8 minutes. Never leave the microwave unattended. Do not use in a Convection/Microwave oven.