Butterfly's latest rubber series launched in 2023, the Glayzer series. The Grey Spring Sponge X is used in the Glayzer 09C. The topsheet combined with the Spring Sponge X is designed to create powerful heavy spin with ease around the table. Unlke the original Glayzer rubber which has a 38 degree sponge, the Glayzer 09C uses a harder sponge at 42 degrees. The high friction tension rubber helps produce a wide range of topspin strokes with heavy spin.