Designed to meet current U.S. Army and Air Force standards, T8 EXREME features a 200g 3M Thinsulate membrane that makes it the ideal choice for windy days or very harsh climates. This style is also durable, thanks to its strong anti-abrasion materials combining leather with nylon. The snug metal lacing and the VIBRAM(R) Grivola sole provide support and traction.  . What&rsquo.s new? Eco-friendly Ortholite Ultralite Footbed designed to meet the ever-increasing demand for ultra-lightweight comfort. This revolutionary Ortholite Eco-formulation utilizes recycled rubber in a proprietary foam technology that achieves unprecedented lightness. Specifically developed to reduce weight without sacrificing the comfort and performance.