Just because you like trekking or hiking or climbing doesn't mean you need to forgo everything civilization has to offer. Especially when the weather is hot, even an easy trail can become a slog and this is why you need something to keep you cool. Something like the Logos Outdoor Electric Body Air Conditioner, which offers all the temperature regulation of a vest or jacket with built-in fans but in a much more convenient unit. You can even wear it when you go shopping or during your commute to work – it comes in three colors (olive, black, light gray) for easier accessorizing!
The Logos Outdoor Electric Body Air Conditioner is essentially a 34 x 20 x 10.5 cm (13.3 x 7.9 x 4.1") fanny pack made for waist sizes 53 to 106 cm (20.9-41.7"). It has two built-in fans that you can use either separately or together with ice packs (it has two special pockets for this purpose). It doesn't come with its own power source but is compatible with 5V/2A and 5V/2.1A USB mobile batteries, and has three power levels to match your cooling needs.
Specs and Features: