RST TPU Shoulder Cup Insert for Tractech Leather Suits Engineered for maximum impact protection, this TPU shoulder cup insert is specifically designed to integrate seamlessly with RST Tractech leather suits. The rigid thermoplastic urethane construction absorbs and disperses energy during contact, providing critical reinforcement to vulnerable shoulder areas. Easy to install into compatible Tractech suits, this replacement insert maintains the suit's sleek profile whilst delivering professional-grade armour performance. Essential for riders prioritising safety without compromising comfort or aesthetics on track or road.