Functional Fly: Easy access when nature calls.
ArmourBlock(tm): ArmourBlock technology neutralizes microbes that cause odor before there's any odor at all.
UnderArmour ColdGear: Recommended for use when temperatures dip below 55 degrees (F), ColdGear features a double-sided fabric that wicks moisture from the skin and circulates body heat. Stay warm and stay dry, and stay out there!
Flatlock seams: A unique stitching that doesn't add bulk where seams come together.