25 to 40F or -4 to +4.4C neoprene side zip BOA boot if you run hot or sweaty these are great all winter boots for you. if you run cold, the volume is adjustable so you can wear bulky showers pass or thin merino socks as your needs change. nice allover reflective features that blend until needed -- see the on model pic from the back. all that black detailing is actually reflective. I got 2 pairs of these and my first pair is still going strong, so offering these to you. Fit is fairly true US womens 9 Mens 7 EU 40 inForm Performance last offers our roomiest, most relaxed fit for on and off-bike use Nylon composite Bronze Series sole provides stiff yet walkable performance Single BOA® L6 dial allows easy and precise fit adjustments Tachyon rubber outsole allows great grip in all terrains Neoprene water-resistant upper completely covers ankles to keep feet warm and dry Durable, GnarGuard rubberized coating protects against abrasions and fights debris Reflective elements increase visibility and add contrast to be seen where it matters most