MAXBELT, adjustable for optimal lower back support. - Product Name: MAXBELT me black - Size: M - Color: Black - Usage: For lower back support - Design: Adjustable belt Thank you for viewing. This is a versatile mesh-type standard model. [Waist Circumference] M: 75-85cm (at the navel) [Front Width] 11.5cm (center of the front closure) [Back Width] 22cm (widest part of the back support) [Materials] Natural rubber, polyester, polyurethane, nylon Only tried on once, taken out of the box but not used.