The Thermotrak Hi is a specialized work boot designed for high temperature work environments (heat resistant up to 300° Celsius). The Thermotrak HI features a built-in metatarsal spat to protect against splashes and welding sparks in addition to quick release Velcro fastening on the inside tab and quick release snap buckle on the outside (no eyelets or laces). The Thermotrak HI is ISO 20345 and NRCS approved.