The Pro Rosin bag from Marucci contains 100% genuine rock rosin, used by pitchers and hitters for a drier, more powerful, and more confident grip.

• 100% genuine rock rosin
• Large, professionally inspired cloth sock
• Recommended for pitchers and hitters for enhanced grip

The Marucci MPROROSIN Pro Rosin Bag is the essential grip enhancement tool meticulously engineered by current and former Major League players who understand the critical importance of superior grip control for optimal pitching and hitting performance in all playing conditions. Designed specifically to deliver professional-grade grip enhancement through authentic rock rosin technology, this premium rosin bag combines traditional rosin effectiveness with professional-quality construction to provide unmatched grip control for pitchers and hitters at every competitive level. The PRO ROSIN BAG features 100% genuine rock rosin contained within a large professionally-inspired cloth sock that offers superior grip enhancement and moisture absorption, providing the dry, confident grip necessary for precise pitching mechanics and secure bat control throughout intensive practice sessions and high-pressure game situations. Developed by a company founded, majority-owned, and operated by big league professionals, this rosin bag represents the same commitment to performance excellence that drives Marucci’s dedication to providing players with the tools they need to succeed on the mound and at the plate, ensuring optimal grip control and enhanced confidence during critical game moments while delivering the authentic rosin performance trusted by professionals at the highest level of competitive baseball.

• 100% genuine rock rosin provides superior grip enhancement and moisture absorption ensuring dry, confident grip for pitchers and hitters during competitive game situations and challenging weather conditions
• Large professionally-inspired cloth sock design offers optimal rosin distribution and application allowing players to achieve maximum grip enhancement with controlled rosin transfer to hands and equipment
• Professional-grade construction delivers durability and consistent performance throughout extended seasons making it an economical choice for serious players who demand reliable grip enhancement tools
• Dual-purpose functionality serves both pitchers and hitters providing versatile grip enhancement for all defensive and offensive positions during competitive play and intensive training sessions
• Premium rosin quality ensures superior moisture absorption and grip enhancement maintaining optimal hand dryness and grip security during humid conditions and extended playing sessions
• Trusted by professional players who rely on authentic rosin performance for maximum grip control and confidence during high-pressure situations at the highest levels of competitive baseball
• Easy application process allows for quick grip enhancement making it ideal for use during games, practice sessions, and tournament competition without complicated procedures or lengthy preparation
• Portable and travel-friendly design allows for easy storage in equipment bags and convenient transport during tournaments and competitive travel while maintaining rosin quality and effectiveness
• Legal for use in organized baseball and softball leagues providing authentic grip enhancement that meets league standards and regulations for competitive play at all levels
• Enhanced grip security improves pitching control and accuracy while providing hitters with confident bat grip for consistent swing mechanics and optimal contact performance throughout competitive seasons

Model Specifications: Model Number: MPROROSIN Product Type: Professional Rosin Bag Rosin Content: 100% Genuine Rock Rosin Container Design: Large Professionally-Inspired Cloth Sock Weight: Approximately 16 ounces Usage: Pitchers and Hitters Grip Enhancement Application Method: Squeeze and pat for rosin transfer Storage Requirements: Store in dry location when not in use Manufacturer: Marucci Sports Equipment Professional Development: Created by current and former MLB players League Approval: Legal for organized baseball and softball Weather Benefits: Superior moisture absorption in humid conditions Portability: Compact design for equipment bag storage Durability: Professional-grade construction for extended use Color: White cloth sock with natural rosin Safety Features: Non-toxic genuine rock rosin formula Warranty: Standard manufacturer quality guarantee