Men"s 2 Layer HydroPur Wool Performance Thermal PantFeatures Heavyweight Two-Layer Wicks moisture Scent blocking fiber helps reduce odor Added Merino Wool for warmthHydroPurDelcron HydroPur Fiber provides unrivaled security and comfort for today"s performance lifestyles. Dual function Delcron HydroPur polyester staple fiber combines the proven moisture management of Delcron Hydrotec Fiber and the antimicrobial properties of SteriPur AM. This ingenious staple fiber contains Antimicrobial AlphaSan from Milliken.Independent laboratory tests have shown that Delcron HydroPur Fiber exhibits significant efficacy against odor-causing and unsightly microorganisms along with superior moisture management. What"s more, both the moisture management and antimicrobial properties are integrated into the fiber during the polymer stage and are permanent.