No more sweat stains

It seems like every year turns out to be the “hottest summer ever” and sadly, it looks like it’s going to be the same for 2025. While there’s a surplus in all the latest cooling gadgets and skincare, no one’s come close to cracking the code on sweat stains, especially around the armpits.

With temperatures averaging at least 30 degrees during the summer months, carrying a fan just won’t cut it. For those who use backpacks, the added pressure of sweaty shoulder straps can make the heat even more unbearable. 

The Waki Hie-ru by Thanko is a cooling device that attaches to your backpack straps and cools your underarms effectively. Unlike traditional cold packs that lose their cooling power quickly, this device stays cold for hours, as it connects to a portable power bank. The cooling plate, positioned near your armpits uses a Peltier cooling system that provides a consistent cooling effect of up to -12°C. Not to mention, it’s discreet.

Don’t let the heat stop you from sightseeing or commuting comfortably, just charge up your power bank and use Waki Hie-ru!

Available for ¥6,980 on the Thanko online store.

Source: Thanko