Best washed by hand. You only need to soak the bicycle shorts with soap, then rub and wash, dry it in the shade. Never use hot water, bleach and other strong acid wash, and do not bask in the sun, because the material will be destroyed easily, fabric loosens and the bike shorts deformation. If you want to use a washing machine, make sure to put the cycling shorts into the laundry bag to reduce the likelihood of deformation.