The Pace Air Tank is built for high-output activities like running, fast hiking, and mountain biking in warm or humid conditions. Constructed from Rerun Jersey — a 115 g/m² ultralight, stretchy fabric made from 100% recycled polyester — it offers smooth next-to-skin comfort with rapid moisture management. A superfine anti-snagging knit and flat seam construction keep irritation to a minimum during sustained effort, while the regular fit allows unrestricted movement.