Friendship/729 Battle 2 National Blue Sponge

This sticky rubber is characterized by its high level of tackiness, which enables significant spin generation for both offensive topspin loops and defensive backspin pushes. It provides a reliable, secure feel during short-game play at the table and facilitates controlled, stable blocking. Players can expect a loud, crisp sound upon contact and, depending on the specific sponge hardness (ranging from 39 to 41 degrees), a noticeable degree of liveliness or catapult effect that assists in less demanding situations.

Performance and Playing Characteristics

• Speed and Power: The rubber exhibits high speed potential, particularly in the harder sponge versions, which act as a powerful offensive tool. While it performs well in smashes, it is highly demanding and requires precise, proactive body engagement and technique to maximize its full output.
• Spin and Arc: The tacky topsheet offers excellent grip for heavy spin. The resulting arc is generally described as low to medium, requiring the player to maintain consistent physical input and follow-through to ensure the ball clears the net.
• Sponge Dynamics: The “National” blue sponge versions offer a more responsive, energetic feel compared to standard or provincial variants. While the rubber can be used directly out of the box, some players may choose to use boosters to soften the sponge, which enhances ball feedback and elasticity without significantly altering the inherent speed.
• Control: Despite its high offensive capabilities, it maintains good control for serves and pushes. It is more forgiving than many traditional Chinese rubbers in neutral shots, though the higher-degree versions necessitate a high level of skill to manage the low throw angle and power.