Smartwool's Microweight Brief is more than just another pair of undies. First of all, it's merino wool: heat regulating, odor repelling and soft like whoa. The elastic waistband is smooth embossed with flatlock seams to reduce chafe and discomfort and has a sweet embossed logo. The classic fly is fully functional and everything you'd ever want out of a fly. That one is pretty basic, but the rest is crazy high tech. These are some Inspector Gadget underwear right here. Shoot, Smartwool even put Seamsoft coating over all the seams to ensure that there's no hotspots during high activity. The Microweight Brief is at the cutting edge of underwear technology and performance.