EcoFlow has released a hat with solar panels and a smartphone charger. Two USB Type-A and Type-C ports are hidden under the brim of the Power Hat, but there is no battery in the hat. You can't charge your gadgets during a walk to recharge them later - you'll have to go everywhere with a wire running from your head to your smartphone. Taking into account all the panels and connectors, the EcoFlo

It's only a concept for now, but if there's interest, they promise to consider launching it into production.