After that, manufacturers tried and errored to make wetsuits easier to wear, and began to manufacture fabrics with jerseys on the back of the rubber. As far as I read the report, it seems that I purposely developed a machine to put on the jersey. That's why not everyone can easily paste it. The jersey to be attached to rubber is easy to understand if you imagine so-called stockings, but the technique of attaching stretchable George to rubber is quite difficult, and it seems that it is still difficult to attach a jersey to rubber, but that machine It wasn't a three-layer structure of glue, sponge and jersey, but I got the technology to stick it together. It's difficult to wear with just neoprene, so I put a jersey on it to make it easier to wear, but there was also a method of applying titanium or a paint (liquid) that makes it slippery like powder on the back side of the rubber. It came off after a long period of use and was not as strong as a jersey. The paint type is still in circulation, and it is manufactured and sold by a company called Yamamoto Scientific Tool Laboratory, which is used for competitions such as triathlons that require wet suits. I used to use it for swimming for a while, but it was banned because of too little water resistance. So, it was used partly because it doesn't have water resistance, so it might be good for surfing, but I think it's difficult to hold down the board because it theoretically moves slimy between the body and the wetsuit. So I think it's better to use the liquid for a different purpose. So if you choose the purpose, you can use it enough, and in the case of freediving, you only use it. (to be continued)