The HRc+Merino™ wool sock has become Giro’s most-loved sock for riders who demand performance. It is now available with a core spun Meryl Merino wool yarn that adds the soft touch of wool for mountain biking and some warmth for cool weather riding. The compressive qualities promote increased circulation with greater arch support, and the extra reinforced toe and heel improve durability. With a 7” cuff height, you have protection on the trail and warmth when the weather gets cool.