Design: Upper is made from durable climbing rubber and recycled nylon Seam-sealed protection Inner bootie can be removed and worn as a slipper In-Shoe Comfort: Inner bootie is insulated with PrimaLoft® insulation Durability & Traction: Silicone screen print on the bottom for added traction Additional Details: Made in collaboration with Christopher Raeburn, a British fashion designer best known for his innovative and responsible reworking of surplus fabrics and garments