Cold Fusion Carbon(TM) Adsorbs odors S3A(R) anti-microbial finish Prevents odors Smooth polyester face fabric Great for layering Microfleece inner lining For warmth Elastic waistband For a secure fit Flatlock seams For comfort Tapered legs For optimal fit & mobility The Underguard Base Pant was a good first step in the right direction to provide whitetail hunters elite scent control and comfort, but there's always room for improvement. The 2.0 pant features an improved fabric with a smooth polyester outer backed with a warm micro fleece lining for a bit of added warmth. Lastly, we bonded our Cold Fusion Carbon(TM) technology between these layers to adsorb odors right at the core, helping you beat the nose of whitetails.