New V-Shape base paired with a wider tip and larger seating area improve comfort and overall performance. Variable density foams throughout further improve long term comfort and reduce pressure especially while in an aerodynamic position. PAS - features a channel in the seat to alleviate pressure and numbness in the pelvic region by promoting healthy perineal blood flow. Nack models feature a Nano Carbon composite rail paired with reinforced seat clamp area for the perfect fusion of performance and reliability. Tirox model features an aerospace light Ti-Alloy rail that provides a balance of weight and strength