DELTA GTX is a state of the art safety shoe with all the new technics in a very classic design. Full grain impregnated TECH leather for best in class durability. VIBRAM rubber outsole with new developed FLEX-SYSTEM technology ensures that the shoe will support your step from heel strike to toe off. High injected PU midsole for maximum comfort and rebound. GORE-TEX® JAZZ stretch upper, first safety shoe brand in the world to launch a boot with JAZZ®-stretch technic. With the JAZZ®--stretch upper we have been able to construct a completely new kind of uppers for boots. With new material we have created “close to body fit” and with new ERGO-ZONES in the shaft this is something you must experience.