zip for easy on/off with stretch back panel for extra flexibility. SUSTAINABLE COMFORT: Insole Technology with cushioning, comfort, & support. Insoles crafted with cushy, plant-based BLOOM foam to reduce plastic consumption. MEASUREMENTS: 14 3/4 inch shaft height, 15 1/4 inch calf circumference. STYLE: Sleek tall riding boot with 1 1/4 block heel and durable sole. Feel the flex in this sleek tall riding boot with just-right stretch and endless versatility. Available in WIDE WIDTH Shaft. Dr. Scholl's New Start Women's Tall Boots NW/OB