Ultra Cool™ 100% polyester mesh 2" wide high performance reflective material with contrasting mesh Zipper closure with hook and loop adjustable bottom for easy boot access Black bottom to help keep clean appearance p span Sold in bulk six (6) pairs per pack /span /p p ANSI/ISEA 107.2015 / ANSI/ISEA 107.2020 Class E /p p em Fabric dye lot variances may occur and meet luminance factor as stated in the standard /em /p p br /p strong " a style float none href https //www youtube com/watch?v k0imofKhi3o target _new CLICK HERE /a /strong a style float none href https //www youtube com/watch?v k0imofKhi3o target _new span style text decoration underline to watch product video /span /a "