Phase Change Matters

Gas and oil personnel don protective suits for helicopter transfer to and from offshore platforms. Viking Life-Saving Equipment's new PS5040 suit is designed for harsh weather and icy waters. The snug-fitting suit features a gas-inflated buoyancy system, integrated spray hood, easy-to-use plastic zippers and a thermal liner that contains phase change materials that absorb the excess body heat and returns it when needed.

“When it comes to passenger suits for helicopter transfer, there are a number of commonly used materials and features that are well-suited to the task,” said Jens Peter Kruse, the Danish company's vice president for personal protective equipment. “We’ve taken this into account with our new suit, and we’ve made a tremendous number of comfort and safety improvements, too.”

http://www.allaboutshipping.co.uk/2015/02/10/new-viking-etso-transport-suit-tough-to-beat

Is there any temperature-regulation problem that phase change material can't solve? CoolCami, a form-fitting camisole, is designed to reduce the discomfort of hot flashes. A cooling liner made from PCMs absorbs the heat generated by a woman's body when a hot flash kicks in. 

The CoolCami company also sells CoolMeMat, designed to provide relief for people who suffer from night sweats. The liners for both products recharge in about an hour at room temperature and provide relief for up to four hours. 

http://www.24-7pressrelease.com/press-release/coolcami-launches-first-wearable-product-for-hot-flashes-398170.php