These Hyvat* ECWCS trousers are designed to be worn over pants and will keep you dry and extremely warm. They feature reinforced seat and knees, pass through openings with snap closure for access to pants pockets, waist elastic drawcords with pull tabs, zipper fly w/ snap closure at waist, leg zippers with with velcro cuffs and taped seams. All these features plus the use of a material known as Hyvat* make these pants the number one line of defense against harsh weather.
*Hyvat is a special fabric that insulates, is waterproof, gives protection against wind and cold, moisture infiltration, evaporation and it promotes ventilation. Its three-layer configuration incorporates two different microporous layers and a specially treated base fabric for durable water repellency.
Layer 1 - ''Foam'' layer with minuscule micropores improves waterproofness, and durability
Layer 2 - Regularly configure micropores increase moisture permeability
Layer 3 - Smaller pores in the resin surface enhance waterproofness, strengthen coating surface and inhibit dew condensation.