Moisture Management With Opti-Dri Fabric. Get the tour look with these stylish Callaway Chev Tech II Trousers, designed to keep cool and dry whilst providing exceptional all round performance. Made from 89% polyester and 11% spandex, the Chev Tech II Trouser is designed to offer maximum comfort and freedom of movement during play. The high quality design with Opti-Dri cooling provides moisture wicking performance, whilst a stretch active waistband ensures maximum range of motion. Finished with a modern flat front design and a tonal Callaway logo above the back right pocket for added style. Callaway golf trousers offer premium quality designed to perform - as worn on tour by Callaway Golf staff players.