Giro: COMPRESSIVE TRAIL PERFORMANCE IN WOOLThe 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 & some warmth for cool weather riding. The compressive qualities promote increased circulation with greater arch support, & the extra reinforced toe & heel improve durabilty. With a 7" cuff height, you have protection on the trail & warmth when the weather gets cool.CONSTRUCTION: Core spin Merino & Meryl Skinlife construction Nylon reinforced toe & heel High rise 7" cuff Made in Italy