These boots are available in 'Regular' and 'Full Fit', where 'Regular' is the normal calf size. The 'Full Fit' is about 3 to 4 centimeters wider. The Ariat Grasmere is equipped with the ATS® technology for ultimate comfort and stability. This boot is equipped with a Sympatex® waterproof membrane and Thinsulate ™ insulation to keep the feet warm during the cold days. The Ariat Grasmere is the perfect boot for outdoor lifestyle. The combination of suede and leather, the double lace system, modern lace eyes and a stirrup-friendly sole make these boots stylish and offer protection. This makes the Grasmere the ideal boot for walking through the countryside, driving or just to stay warm.