The elastic range can be adjusted within a wide range. Made of high quality and comfortable fabric for women skin.Five hidden metal brackets support your back and waist. The edges of the waist belt do not pucker or slip off.80% Polyester, 20% ElastaneThe design of the ventilation holes is designed for all seasons. Because it's breathable.It is a clothing belt for postpartum recovery. It will continue to be useful to you after postpartum recovery. Abdominal weight loss, muscle training, back support, training protection.Use 6 to 8 hours a day. Take it off while you sleep. Please relax it half an hour before eating and use it after half an hour.