The Challenger one piece race sit from Alpinestars boasts many features to keep the rider safe and comfortable on the road or track. In addition to the protection already present at the shoulders, elbows and knees, there is also the facility to and the Alpinestars chest and back protectors if the rider prefers that to separate strap on armour. Stretch and ventilation panels assure the rider's comfort and continued concentration on what is important.

• 1.3mm full grain cowhide construction
• Perforated front leather panels for ventilation
• Stretch panels on the sides of the arms, crotch and back of knees improve fit and feel
• CE certified protectors on shoulders, elbows
• CE approved GP-R knee/shin protectors feature floating construction for precise fit
• TPR shoulder reinforcement for additional protection
• Aero hump for improved aerodynamic and ventilation performance
• Multiple external perforated leather panels with foam protector inserts
• Large accordion stretch panels help rider movement and comfort on the bike
• Removable and washable mesh liner
• Inner waterproof pocket
• Innovative calf expansion gusset improves range of fit and riding comfort
• 3D multi panel knee construction
• Chest pad compartments with PE padding (pads sold separately)
• Integrated PE foam padding on chest, hips, coccyx and back
• Alpinestars PU sport knee sliders
• Multiple snap button system to integrate level 2 CE certified Alpinestars Bionic back protector (sold separately)