|CW-X Xtra Support Running Sports Bra III (165105). Kick your workout into high gear with this high impact racerback sports bra. Made of Coolmax polyester; Lycra spandex and polyester. Wireless lined cup has high impact protection for running. Encapsulated cup has extreme compression to prevent breast movement. Cup has vertical flat-lock seam at side to prevent chafing. Patented 5-point Targeted CW-X Support Web internal front support has an extra layer of mesh webbing that is especially designed for runners; providing optimal motion control to protect breasts. Elastic trim along neckline and arm openings for fit. Tall; super-soft elastic underband helps prevent chafing . Coolmax/Lycra spandex tricot fabric with LiteStretch mesh sweat channels under cups offer moisture wicking for breathable comfort. Ventilated sides; back and straps for air flow. Crossed; restricted stretch ventilated mesh racerback straps do not adjust. Coated metal hook-and-eye closure in back; see Fitter's Comments below for hook count.