UP-CLOSE Reebok Krios Tactical Boots
and Associates in 1969. Normally, some- thing that is waterproof is not breathable (plastic) and something that is breathable is not waterproof (cotton). Gore-Tex is both waterproof and breathable. The Gore-Tex fabric repels liquid water but allows water vapor to pass through. Gore-Tex is poly-tetra-fl uoro-ethylene (PTFE) that has been stretched to form a micro-porous plastic fi ber that is 70 per- cent air. In liquid form, the water droplet is simply too large to pass through the micro-pores of the Gore-Tex membrane… like 20,000 times too large. In vapor form, evaporating (transpiration) water passes right through. Waterproof and breathable equals all-weather comfort. For his inven- tion, Robert Gore was inducted into the National Inventors Hall of Fame.
Premium Upper, Midsole, Insole, Midsole The Krios boots have an upper made of genuine cattle hide leather and 1000 De- nier Cordura® nylon. Denier is a measure of weight of the fabric. A 1000D nylon has more abrasion resistance than 500D nylon, for example. Cordura has a more natural or cotton-like appearance. Cor- dura is the best name in nylon fabrics. The built-in durability of the Krios comes from this use of a real leather and Cor- dura nylon upper.
The insole sits directly beneath the foot. The insole helps distribute the weight of your body evenly over your heel and arch to reduce trauma. The midsole is located between the outsole and the upper and is an extremely important part of the boot. It stabilizes excess foot motion and pro- vides cushioning and shock absorption. The premium materials for these parts of the boot are EVA (ethylene vinyl acetate) and PU (polyurethane). EVA is a foam that is light and gives excellent cushioning. PU is also a foam, but it is denser, heavier, and more durable than EVA.
MeraMAX and PU Construction The insole has a removable polyure- thane cushion insert with a gel heel pad. The outsole is a two-part, dual-density construction made of a MeraMAX® polyether polyurethane bottom and a shock-absorbing polyether polyurethane cushion midsole.
44 LAW and ORDER I January 2016
Polyethers work well in applications requiring direct contact with human skin. With a high resistance to skin oils, polyethers have high moisture-vapor transmission rates, maintain their fl ex- ibility in low-temperature environments, and can withstand prolonged exposure to high humidity environments without degradation. Polyethers weld easily, have a softer, non-plastic feel, and will not sup- port fungal growth.
The MeraMAX OS-42 midsole mate-
rial is used in conjunction with the Mera- MAX outsole material. OS-42 is made to enhance shock absorption and energy return. The Krios does not use the sewn outsole construction. Instead, they use the direct-attach molding technique. OS-42 is used as the midsole material for failure-proof adhesion between the midsole and outsole, and between the midsole and leather upper surfaces. This
combination of OS-42/MeraMAX boot soles reduce weight, improve comfort, and increase durability.
All-Weather Traction Krios comfort comes from Gore-Tex. Du- rability comes from Cordura and Mera- MAX. However, none of this matters without traction. The Krios boot is rated “Best” among Reebok tactical boots for wet and oil surface slip resistance, based on ASTM Mark II slip-resistance testing. Footwear traction, of course, like tire trac- tion, is a combination of tread patterns and sole compounds.
MeraMAX dual-density soles are NATICK approved for the U.S. Army Hot Weather Boot contract. Compared to rubber compounds, MeraMAX polyure- thane soles have three times the wear, two times the slip resistance, 50 percent better shock absorption, better low tem-
W
arson Brands, headquartered in St. Louis, Mo., is a global manufac- turer and marketer of military, tactical, and industrial safety footwear since 1989, and provides a variety of work and duty footwear under
the world’s fi nest brand names, Reebok, Rockport Works, Florsheim, Iron Age, Grabbers, and Knapp. Warson Brands is best known for innovation in the areas of foot protection and comfort.
Warson Brands’ innovations in the area of foot protection include developing 100-percent non-metallic protective toe caps made from composite material that is stronger and lighter than steel, and also will not conduct heat, cold, or electricity. Innovations also include protective arch, heel, and metatarsal guards; outsoles that resist chemicals, abrasion, slick surfaces, and extreme heat; and patented devices to protect workers and equipment from static dis- charge.
Reebok International, headquartered in Canton, Mass., is a leading world- wide designer, marketer and distributor of fi tness and lifestyle footwear, ap- parel and equipment. An American-inspired global brand, Reebok is a pioneer in the sporting goods industry with a rich and storied heritage in running, train- ing and fi tness. Reebok is committed to helping consumers fulfi ll their po- tential and be “fi t for life.” A subsidiary of the adidas Group, Reebok operates under the multiple divisions of the Reebok brand, Reebok-CCM Hockey and the Sports Licensed Division.
W.L. Gore & Associates is a technology-driven company focused on discov- ery and product innovation. Well known for waterproof, breathable Gore-Tex fabric, the company’s portfolio includes everything from high-performance fab- rics and implantable medical devices to industrial manufacturing components and aerospace electronics. Founded in 1958 and headquartered in Newark, Del., Gore employs approximately 10,000 associates in 30 countries worldwide.
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