Keds Moxie Washed Twill Mules. It's the moment of the mule, and no wonderâwith its slip-on-and-go ease, it's just the thing for every spontaneous warm weather moment. Our Moxie Mule features comfy washed twill uppers. Washed Twill upper. Backless slip on mule style. Embroidered eyelets detailing. Soft breathable jersey lining. Hidden gore. Removable EVA footbed. Flexible, textured rubber outsole. Spot wash. Imported.