Castelli Quindici Soft Sock The Quindici Soft Sock is comprised of a Merino wool blend to deliver breathable comfort and support. It's lightweight while still providing a full-length 15cm cuff. The seams are set back from the toe to prevent discomfort, and stretch webbing goes over the top of the foot to induce support. Features 15cm cuff provides full length protection Highly breathable with lightweight profile Merino wool blend is exceedingly comfortable