Louis Garneau X-Lite Tri Shoe Faux Leather Synthetic Carbon Composite Air Lite outsole with patented multivent system:Provides excellent rigidity and increased ventilation Adjustable cleats:Cleats can be moved 7 mm back and forth Replaceable low-profile rear heel pad HRS-100 with 0.6 mm membrane:Maintains heel positioning and reduces loss of power from slippage Reversed velcro closure with Power Flex system:Enhances support without pressure points