This Ergodyne Chill-Its 6260 is a lightweight phase change cooling vest offered in size S/M and listed in new condition. It includes packs and may be a practical option for buyers looking for wearable cooling gear for work, outdoor tasks, events, or hot indoor environments. The size is worth noting when comparing fit and layering needs, especially if you plan to wear it over a shirt or under other gear. Free shipping is included, which can help with overall purchase value. If you are shopping for a cooling vest and want a straightforward option from this model line, this listing may be worth considering. Check the listing for full details. Ergodyne Chill-Its 6260 Lightweight Phase Change Cooling Vest W/ Packs, S/M. Color: Black, Condition: New. Listed at 95.00 USD. What is Phase Change technology?. Ideal for workers in pulp/paper, iron/steel, vulcanizing, foundries, etc. or for people running, biking, doing yard work, riding motorcycles and more! Also, ideal for those needing cooling relief but aren’t able to use an evaporative cooling option.