When it gets too chilly to wear your Boston Clogs, grab your Stirling Shearling lined boots! This clog inspired boot will keep your feet cozy and comfortable through the winter months. With a completely lined inside and footbed your feet are going to love these boots. A rugged sole will keep you from slipping in icy conditions. Upper material: Leather - thick yet supple leather that is breathable, durable and comfortable. Footbed: Removable footbed - a removable classic Birkenstock footbed minus the toe bar.