With top-quality uppers, a new Micro-Fit buckle, and a lightweight and efficient Silver-series carbon outsole, the RL packs the performance punch of its big brother RXL, but without the premium price tag. And since we use the same overall construction techniques as found on the RXL, the RL brings an unprecedented level of comfort to this category of shoe. With so much performance and comfort, it's no wonder Outside Magazine declared the RL Road a "killer value."Lightweight Silver Series Carbon sole1.5mm incremental release Micro-Fit buckle with two-position receptacleSynthetic uppers with Lightning Mesh panelsReplaceable heel walking studsErgonomic inForm footbedinForm Pro last