Using this maternity waist extender is super easy. First, find the buttons and button - holes on the elastic band. Then, simply attach it to your existing pants or skirts. As your pregnancy progresses and your belly grows, you can adjust the band to make sure your clothes still fit comfortably. When it comes to maintenance, it's best to hand - wash it in cool water with mild detergent. Avoid using bleach as it may damage the elastic. Hang it to dry. Also, don't over - stretch the elastic band when not in use to keep its elasticity. Keep it in a dry place away from direct sunlight.