Yestyle Waist Corset for Weight Loss Sport Body Shaper Tummy Fat Burner High quality fabric breathable and comfortable enough to be worn all day long, sweat-free comfort, antibacterial, moisture wicking. The waffle knit fabric is 90% nylon and 10% spandex, making our trimmers durable. Hand wash for best results. Adjustable 6 rows hook&eyes,high elastic free support. When worn during exercise, the compression stimulates thermal activity in your core which increases perspiration, allowing toxins to escape. It helps to reduce 4-5 inches in waist when you wear it.you could read size pictures on left to select the right size you need