Ruby Expert Gel WMN BLK Designed to position the rider for optimal power transfer and comfort; its Body Geometry channel maximizes blood flow. Patented Body Geometry design is lab tested to assure blood flow to sensitive arteries Stiff, carbon reinforced shell for longevity and all-day riding efficiency Lightweight and supportive PU foam with gel inserts for increased comfort over longer rides Lightweight and durable hollow titanium rails Tough, light weight and water resistant Micromatrix™ cover Size 143mm/ Weight 218g Size 155mm/ Weight 226g Please indicate which 1 you need.