Can I Wear Custom Orthotics In Winter Boots? Call Tanglewood Foot Specialists today at (713) 785-7881 to schedule an appointment. When you call, request our free book, One Step Ahead: A Foot Owner’s Manual. A custom orthotic is designed to balance the foot and ankle. A winter boot is meant to keep the foot and ankle warm. Typically a winter boot lacks structure and support, since warmth alone is it's primary function. This is especially true when it comes to those such as the popular Ugg boots. Of course, an orthotic isn't going to provide any warmth to the foot. It's only practical to think that the two should work together well.