Using this mattress topper is easy. Just place it on your king - size bed and fit the deep walls around the mattress. For best results, use it on a clean and dry mattress. When it comes to maintenance, you can machine - wash it whenever it gets dirty. Use a gentle cycle and mild detergent. Avoid using bleach as it may damage the microfibre filling. After washing, tumble dry on low heat or air dry. This topper is allergy - sensitive, so if you have allergies, it's a great addition to your bed. Keep it away from sharp objects to prevent tears.