Chaser Cowl Neck Back Vent Tank in Ivory. - size L (also in ) Chaser Cowl Neck Back Vent Tank in Ivory. - size L (also in ) Cotton blend. Metallic stripes. Knit fabric. CSER-WS606. CW6628. Born out of the angst of the LA punk rock scene, Chaser was molded by the evolution of the music scene. Utilizing soft blends, Chaser tees are luxuriously soft and their designs continue to evolve with the ever changing music scene.