04/06/2026
What if existing personal protective equipment (PPE) could help keep outdoor workers cool?
That question led Team Coolah to develop an innovative cooling solution for outdoor workers — an idea that earned them a place as one of three winning teams in the Boeing University Innovation Leadership Development (BUILD) Programme 2026.
Made up of Class of 2025 Mechanical Engineering graduates Wilson Yeo Si Kai, Lee Chuan Zhe, and Tan Jing Jie Jethro, Team Coolah created a practical solution to improve comfort and safety for outdoor workers in Singapore’s hot and humid climate.
Organised by Boeing in partnership with NUS Enterprise, the BUILD Programme supports student innovators tackling real-world challenges in areas such as advanced technology, sustainability, and social impact. The three winning teams each received USD 10,000 in funding and three months of incubation support.
Team Coolah’s idea enhances existing PPE with two products: the CoolHelmet Attachment, which clips onto most hard hats to cool the neck area using a Peltier plate and micro-fans, and the CoolVest, which fits specially developed Phase Change Material into a standard safety vest for hours of cooling without skin discomfort.
Reflecting on the journey, Wilson currently a PhD student in Materials Science and Engineering and an Associate Scientist at Temasek Laboratories @ NUS, shared: “We started as three guys who thought existing cooling solutions weren’t good enough for our outdoor workers and decided to build something better. This recognition from Boeing means a lot — it tells us the problem is real and worth solving and gives us the confidence to keep going.”
Supervisor Assoc Prof Wenming Yang (Department of Mechanical Engineering) commended the group, “It has been a privilege to guide and support such a talented group, whose collaborative spirit and problem-solving skills have been instrumental in this accomplishment.”
meche