The JL Loose Fit Vertex Tank perfect for warm weather work-outs, the Erg, or just lookin’ good! In addition to this being an awesome, loose fit, lookin’ good showin’ off your guns kinda thing – the ink GLOWS IN THE DARK! Yeah! We know – AWESOME!!!!!! Vertex has a dual-layer ribbed construction, which gives it more stretch than other woven fabrics, providing excellent movement when worn loose or close to the body. The inside layer is made of recycled polyester, with engineered wicking, while the outside layer is rated for sun protection. This tank is UNISEX; great for men and women!