WISH vacuum sealer bags are made of advanced composite material, food grade and BPA free. Special structural characteristics innovation offer them ideal vacuum property, they will keep your foods fresh and expand foods lifespan. </br> </br> <b>How to use: </b></br> Cut vacuum sealer bag rolls into the size you need</br> Insert one open end of bag into vacuum sealer machine to seal, MAKE SURE IT’S SEALED PERFECTLY, OR IT COULD NOT BE VACUUMED </br> Put your food into bag, insert another open end into machine, and start to vacuum seal</br> </br> <b>Features: </b></br> BPA free, safety food materials, greatly extend storage time</br> One side clear, another side embossed –excellent vacuum property, perfect for resale of goods</br> No markings on bag - No writing area for labeling</br> Boilable </br> Freezable</br> Reusable</br> Microwave Safe</br> Dishwasher Safe</br> </br> <b>Compatible with all "clamp style" vacuum sealers: </b></br> Seal-A-Meal</br> Black & Decker</br> Weston</br> VacMaster</br> Rival</br> Deni</br> Kenmore</br> George Foreman</br> Cabelas</br> and many more</br> </br> <b>Warranty: </b></br> 30-Day Money Back Guarantee