Hot Chillys : Bio Silver

Review:
With its silver ionized yarns, not only is this particular layer anti-microbial, it also is made anti-stink through its construction. Hot Chillys is doing amazing things with different materials and fibers to provide long underwear that is not only warm, but doesn't make you smell bad either. The different fibers also provide various looks. This, in comparison to the Micro Active Shirt, is more tightly woven and stiffer, while still soft. I like it best as a layer over a thinner underlayer shirt. It works best for me as a second layer combined with Hot Chilly's Micro Active layer.