Techniche 6529-HV-L Evaporative Cooling Vest L Since it is unopened, size measurements are unavailable. ★ Condition ・Unused, unopened item. ・The bag has scratches and marks. ★ Size ・L ★ From online information: Cools for 5-10 hours per soaking. Lightweight and comfortable fit. Water-repellent nylon lining. The HyperKewl fabric inner provides effective active cooling without swelling, chemical leakage, or leaving behind a flimsy residue.