This is absolutely new to me. Somebody tried to sell on Facebook a necklace for 80€ (second hand)! The yonex VX4! Why so expensive? Checkout my Screenshot, the benefits are too good to be true ^^ Couldn't find anything on yonex official website. Seems to be sold in asian countries only. Does somebody have official sources? I am curious what you think about that. It reminds me of a similar scam: Powerbalance wristband...
Saw this to awhile ago & see KM wear it to, but i think its more about appareal or accesories than for healthy purpose. Other than that i can also found Yonex Whistle, Yonex scissor for cutting broken string, & many others. Not sure if its official or just some random riding Yonex big name. Help circulating blood, might be true (idk for sure) but prevent neck pain... Lol never in my badminton life i would had neck pain unless you use 3 racket style & you hold 1 on your mouth. & Less tiring its not logical i guest. Even if im forced to acknowledge it, maybe due to better blood circulation, you have better fitness.
