Be careful to become very very slippery when surface of sheetgets wet. / Use on a flat surface with no uneven surface or sharp items underneath.Do not jump or run on top of the sheet.When using under the sun, there is a possibility of getting sunburn from the reflection off the product, even if sunlight does not hit you directly.Do not place hot items directly onto this product.Do not let thinner, benzene, alcohol etc. remain on the product.Do not use or store in a place subject to direct sunlight, high temperature or high humidity.Keep away from fire and other sources of heat.