Leather Zip-Up Biker Boots for Wider Calves. Biker-style boots. Leather uppers. Decorative zip on the outside. Zip fastening inside. Fabric lining. Foam-backed leather sock. Sole, other materials. 2 cm rubber-effect heel. Unifit boots, specially designed for wider calves. Made in Portugal. And buy this Leather Zip-Up Biker Boots for Wider Calves Now £175.00.