Startups inventing cooling clothes for a hotter future

Every morning, thousands of construction workers in Qatar start their day by soaking their uniforms in water. The two-minute ritual kickstarts an important process: When the workers are toiling outside — often at summer temperatures above 120F (48C) — their uniforms can cool skin temperature by as much as 8C (14F), for up to seven hours.

The uniforms are made by British startup Techniche UK, which brands them as StayQool suits. Constructed from an outer layer of specially designed mesh, plus a waterproof inside layer, the suits absorb and remove heat through evaporation. They’re also adjustable: Workers can add or remove a cooling collar or wrist cuff as needed.