Made in the USA from 100-percent recyclable material * Maximum comfort; includes our exclusive "All-Day-Comfort-Insole." Thickness: 7mm heel/5mm ball * Fit info: 1/2 sizes order up, and for a perfect fit use our exclusive 1/2 sizer insole - search style 330BK * Lower and wider opening than other boots - more room for calf and/or pants * 100% Waterproof with deep lug sole