Sony's Reon Pocket Pro Plus Refines Personal Cooling Wearable

Sony's Reon Pocket Pro Plus uses Peltier-effect thermoelectric cooling — a solid-state method that transfers heat via electric current — through a metal plate on the back of the neck. It delivers a 20 percent cooling gain over its predecessor, adds four warming levels, and costs $260. Born from a 2019 Japanese crowdfunding project, Engadget's August 2026 review found it genuinely effective in heatwave conditions, though battery life fell short of Sony's claims.