To use these Casey Cotton flat sheets, simply place them smoothly over your mattress. For a better fit, tuck the edges under the mattress. When it comes to washing, use a gentle cycle with mild detergent in warm water. Avoid using bleach as it may damage the fabric. After washing, tumble dry on low heat. This will help maintain the softness and durability of the sheets. You can iron them on a low - heat setting if needed. Keep these sheets away from sharp objects to prevent snags. With proper care, they'll serve you well for a long time.