"Carry along excellent thermal protection during unpredictable or transitional weather. Roubaix's closed-face outer surface enhances wind resistance while its fleecy inner surface delivers proper moisture management and exceptional warmth. Size 2 = Large 29" Length Size 1= Medium 29" Length Circumference at the ankle and upper leg is greater with the larger size Suitable for the colder spring-summer-early fall days Soft rubber grips holds warmers in place, while the multi-panel anatomical design provides an ideal fit ASSOS Roubaix 2-ply fabric has a tightly woven, wind breaking nylon/lycra outside with soft, moisture wicking fleece on the inside"