In-Shoe Comfort: Dual density 1:1® footbed is ergonomically designed to provide optimal support, pedaling efficiency, and comfort Perforated synthetic leather upper is durable and breathable BOA® Fit System with dual L6C dials for zonal fit adjustments Soft TX lace guides eliminate pressure and hotspots Durability and Traction: 1:1® PRO Carbon Power Plate drops weight and adds extra ventilation without sacrificing stiffness EVA foam and rubber heel bumper gives stability and walking comfort 252 grams per shoe (size 42)