Beat the heat with the Mobile Cooling® Hydrologic® Vest—trusted by outdoor workers, athletes, and adventurers alike. Powered by Hydrologic® evaporative cooling technology, this vest uses a Super Absorbent Polymer (SAP) quilted liner to retain water and deliver hours of cooling comfort. Simply soak for 1–2 minutes, wring out, and wear over your shirt. As water evaporates, it pulls heat from your core—helping regulate body temperature and keep you going in high-heat environments. Lightweight and low profile, it layers easily under protective gear or over casual wear. Optional 3-phase Cooling Ice Packs can be added to boost performance during extreme heat.