Coldpruf Peak Performance Warmer Mock Top - Men's Black Medium. The super-soft brushed microfiber fabric contains an anti-microbial carbon agent which permanently staves off odors. This lightweight fabric provides a next-to-skin athletic fit with flatlock seams which work together to make your base layer one less thing to worry about during cold weather activities. Package Contents: Coldpruf Peak Performance Men's Warmer Mock Top Coldpruf 72MMDBK: Peak Performance Warmer Mock Top - Men's Black Medium