The Pace Air Tank is built for high-output activities like running, fast-paced hiking, and mountain biking in warm or humid weather. Constructed from Rerun Jersey — a superfine, ultralight recycled polyester knit — the fabric delivers next-to-skin comfort, quick moisture release, and stretch without restriction. Flat seams are positioned to minimize chafing during extended effort, and the anti-snagging knit maintains its integrity through repeated use and washing.