This is what I found in a Japanese website:
Omega VII Hyper is the latest XIOM rubber to be released in late December 2019.
A new family is added to the OMEGA VII series, but the concept differs greatly from the previous lineup.
The reference for the development is a certain Chinese-made adhesive rubber used by many Chinese national players.
To reproduce the world's strongest spin ball created by an extremely hard sponge and a strong spinning topsheet, we first redesigned the sponge design.
In other words, the density of the pores is extremely high, achieving a sponge hardness close to the original Chinese rubber.
The hardness is 55 degrees, which is the same as the tour, but it is even stronger.
However, the docking of a thin, supple and easy-to-grip topsheet that made full use of the cycloid technology kept the overall rubber hardness (tester feel) below 50 degrees.
This special tuning gives the player the feeling that the ball at impact will momentarily stop on the rubber surface, even though the topsheet of the OMEGA Hyper is not sticky.
This is the Chinese rubber feeling.
In addition, the dramatically hard tension sponge has enough power to launch the ball, so it is unlikely that you will feel lack of speed.
The performance of adhesive rubber made in China drops dramatically when the adhesive strength of the top sheet decreases, but there is no such concern with Omega VII Hyper.
Stable performance and outstanding control are always ensured, so it can be used in top conditions for a long time.
Omega VII Hyper is the ultimate rubber that has surpassed it in terms of ease of handling while being comparable in hardness and power to Chinese rubber.
What's going on behind the scenes, the strongest in the world? This new monster should tell you the answer.
View attachment 20413
This table shows all xiom rubbers, in order speed, spin, sponge hardness.
Omega VII hyper and Vega X are available on TTJAPAN since this december