Using these sheets is a breeze. Just put them on your mattress, and you're ready for a comfortable night's sleep. When it comes to washing, use cold water in the machine and set the tumble dryer to low heat. You can use bleach if needed as the fabric is bleach-safe. Make sure not to expose them to extremely high temperatures, as they've only been tested up to 370 degrees. For long - term use, always follow the washing instructions, and they'll stay in great condition. The fitted sheet is designed for mattresses up to 14 inches deep, so ensure your mattress fits within this range for the best fit.