Smartwool Men's Classic Thermal Merino Base Layer 3 4 Bottom Size:XXL Packaged with a SRAM X01 Packaged with a SRAM X01 Eagle drivetrain and RockShox suspension Junior LastBoot shell addresses common problem fit areas for a comfortable fitFocus on ComfortComfort fit liners feature soft materials for all day cushioning and warmthDurable Aluminum Buckles100% Aluminum buckles provide long wearing durability and ease of operationGripWalk® Compatible (Sold Separately)GripWalk® soles feature a rubber tread and rockered toe for a more natural walking motion and increased traction while a newly redesigned base layer pants fit helps reduce sag and excess fabric—perfect for your layering needs 100% Merino wool fabric made with an interlock knit for enhanced comfort