Ash Willmott and Dr Neil Maxwell carried out the successful product testing of the CAERvest® – a novel endothermic hypothermic device for core body cooling safety – on behalf of Bodychillz Ltd. The CAERvest® was used in both the Brighton and London Marathons on some runners who presented symptoms of exertional heat stroke. In all cases using the vest saw rapid reductions in core temperature and the London Marathon Race Medical Director greeted the Director of Bodychillz Ltd. by saying, “Today, Steve, you have saved a life! I believe you are really onto something here.” and later tweeted “@CAERvest Amazing therapy for serious heatstroke at the @LondonMarathon today #savinglives”. The CAERvest® has also been successfully used on pilgrims in the Hajj. Phase 2 evaluation of CAERvest® on-going.