Derek Rose Jack Pima Cotton TrunksnavyDerek Rose's expertly blended pima cotton trunks promise a luxurious foundation to every outfit. Fine gauge, they are made with ultra-fine seams and extra-soft threads for a superior fit, longevity and comfort.Derek Rose's expertly blended pima cotton trunks promise a luxurious foundation to every outfit. Fine gauge, they are made with ultra-fine seams and extra-soft threads for a superior fit, longevity and comfort.