Casual by nature, comfortable by design, the shoes of the Otto Collection feature a soft upper, lightweight EVA/rubber sole, and molded EVA footbed with Bloom Technology. The Nunn Bush Otto Plain Toe Chukka Boot is a fresh perspective on a classic chukka, so you can be confident you'll always look your best. Made in the USA or Imported Ethylene Vinyl Acetate sole Shaft measures approximately Ankle from arch Boot opening measures approximately 11 around Soft leather, suede and durable man-made upper Defender repellant powered by Scotchgard for enhanced water-resistance and stain protection Breathable, fully padded mesh linings for exceptional moisture management and 360-degree padding Molded/removable EVA footbed that absorbs the pressure of each step and provides all-day comfort Footbed created with 20% BLOOM Algae, which will return 32 liters of clean water to habitats and clean 20 cubic meters of air