FXD LS-1 LIGHTWEIGHT 4-WAY STRETCH WORK SHORT KHAKI FEATURES A GROUND-UP FXD DEVELOPED AND TESTED 4-WAY STRETCH POLYESTER WITH DURA500(TM) ADVANCED NYLON AND POLYURETHANE CANVAS ABRASION PANELS. DURA500(TM) IS A 500 DENIER NYLON OXFORD TREATED WITH POLYURETHANE FOR HIGH TENSILE STRENGTH AND PERFORMANCE DURABILITY. DURA500(TM) PROVIDES LONG-LASTING ENHANCED TEAR AND ABRASION RESISTANCE.