Yes, hand-wash only.
Remove the panel and set the fasteners in place so that they align and meet each other completely. Wash with mild soap in warm water. Rinse and flat-dry in the shade.
Do not machine wash, tumble dry, dry clean or use bleach.
Do not wash with other items. First two or three washes may cause the support color to run. Do not put it together with other things while it is wet.