Extra high boots for extra levels of protection. This extra high shoe makes the heavy duty line complete and provides added protection. Now also heat and cold insulated (HI and CI). Ankle protection "Comfort Sponge" with added padding provides a more comfortable feel and better fit. Fornax is very easy to put on and take off; the vertical eyelets on the shoe make lacing laces very simple. Thanks to the new lacing there's no need for a zip.