Designed to be worn underneath your pants or waders, the Simms WaderWick Core Bottom provides warmth where it counts to keep you fishing in the coldest conditions. Engineered with Simms’ new Baselayerfit, which contours to your body to keep you warm, the Simms WaderWick Core Bottom is made for slightly colder conditions than the Simms Rivertek Bottom. The two-way stretch knit fabric offers excellent breathability and mobility as well, which makes it easy to move around without feeling restrained or over-heated. Additionally, the Simms WaderWick Core Bottom is constructed with PED Dry fabric & COR3 technology that helps fight odors and wick away moisture. For added comfort, the Simms WaderWick Core Bottom also has a plush elastic waistband that is branded with the Simms name. Fish in absolute comfort with the Simms WaderWick Core Bottom.