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Butterfly has announced "Spring Sponge X". New and improved sponge from their spring sponge technology.
Details and new rubbers will be announced on 7th of January.
I've asked Butterfly sales person if sponsored players are already using new sponge but undertandably he said he cannot confirm anything yet.
New rubbers will be on sale from 2019 Spring.
https://www.butterfly.co.jp/news/product/20181218.html
Details and new rubbers will be announced on 7th of January.
I've asked Butterfly sales person if sponsored players are already using new sponge but undertandably he said he cannot confirm anything yet.
New rubbers will be on sale from 2019 Spring.
https://www.butterfly.co.jp/news/product/20181218.html