Why Spoon/Mugen socks and not tennis wristbands?
Why spend so much on a Spoon or Mugen sock? Well, I have the answer.
I recently got a "Kellogg's" sock. It's black in colour unlike the blue spoon or orange mugen. Well, I tried burning some of the Kellogg's and Spoon sock's material. The verdict? Spoon's material was fire-retarding. When exposed to a flame, it just shiriveled up into nothing, which is good if you want it NOT to burn. The kellogg's sock on the other hand burnt and left behind glowing embers, which can ignite petrol fumes.
So... Spoon socks yes. Kellogg's socks no.
BTW, if you buy fake Spoon or Mugen socks, I'd bet that they burn and leave behind embers like my free Kellogg's sock.