Minnetonka Thunderbird Boat Sole - Smooth Product Description Womens Thunderbird Moccasins: Thunderbird Boat Sole features stitched-on boat sole cushioned insole. Cut from only the best leathers. Crafted in the most popular best-selling styles. Combining the best fitting qualities and long-lasting comfort. Thunderbird bead design is a classic that is recognized around the world! Definitions Insole Leather Fit: This style tends to run small. For an accurate fit we recommend purchasing a 1/2 size larger than you typically purchase. For example if you normally purchase a size 7 we recommend purchasing a size 7 1/2.