To use these men's pajamas, simply put them on before bedtime for a comfortable and relaxing sleep. When washing, remember to use cold water and wash with similar colors to keep the fabric in good condition. Don't use bleach as it may damage the fabric. After washing, tumble dry on low to prevent shrinking. Avoid ironing and dry cleaning to maintain the quality of the pajamas. Refer to the size guide to choose the right size for you, and keep in mind that actual measurements may vary a bit.