Pellon®’s Wrap-N-Zap is a microwave safe product is 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. 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. Made of: 100% Cotton Does not Contain Scrim Loft: Low Washing/drying instructions: Washable by hand or machine. Dry cleanable. Please note: do not wash batting until covered in fabric / completed project.