|KLOGS Boca Polyurethane Shoe in Black. We\'ve taken our best-selling Dusty and kicked it up a notch with our new closed-back Boca! Kicking up your heels has never been so WOW comfortable! Our closed-back design will let you kick as high as you want - this klog isn\'t going anywhere! On the outside, polyurethane construction makes Boca: durable, flexible, light-weight, shock absorbing, easy to clean Inside, our latex-free footbeds cradle your foot in comfort for extra shock absorption and are anti-microbial to resist odor. Unisex styling makes Boca the perfect shoe for anyone on their feet.. KLOGS are meant to have a slightly looser fit than most other footwear. It is normal when wearing KLOGS to feel your heel lifting up and down with every step. Polyurethane Sizing – KLOGS does not offer half sizing in our polyurethane styles. Therefore, if you wear a half size, you should consider sizing up. Please see KLOGS Fit Chart for Men and Women individual style and gender fitting. KLOGS polyurethane does not stretch over time. The way your polyurethane klog fits the day you purchase it will be the way it fits over the life of the product.