The mark consists of the three dimensional trade dress design of a lower extremity ambulatory protective device for which the following aesthetic features are claimed: (a) multi-patterned bottom sole containing different textured patterns, namely, one black shaded oval with a large three-dimensional zig-zag pattern on the heel and another on the forefoot, each of which is surrounded by a second larger smooth white oval, with a shaded smooth black trapezoid between the larger ovals and a smaller three-dimensional zig-zag pattern in red surrounding the ovals and trapezoid, in addition to a white border featuring three-dimensional horizontal stripes surrounding the outside border of the sole at the forefoot and heel; (b) two-tone side sole featuring two parallel and horizontal white and black stripes that run along the entire circumference of the device. In the lower half, the white stripe splits by the heel to create a border for a black trapezoid shape. The white and black stripes also feature three-dimensional notching patterns to the right and left of the black trapezoid. This feature is symmetrical and appears on both the inner and outer portions of the sole; (c) A gray zig-zag pattern on the back left portion of the device that begins at the top of the device and travels down toward the sole, where it turns to the right and extends horizontally to the middle of the device. This feature is symmetrical and appears on both the back left and back right portions of the device; (d) three-dimensional red piped border outlining the zig-zag pattern on the back left portion of the device and the triple-notch shape on the front panel of the device. This feature is symmetrical and appears on both the left and right sides of the device; (e) Sixteen three-dimensional circle cut-outs on the right side of the upper portion of the device within the gray zig zag pattern; (f) seven large three-dimensional circles in a black rectangle box on the front upper portion of the device; (g) front panel of the device features a triple notch shape in black dark shade, with a light gray three-dimensional piped border outlining the notches. Each notch contains a piped three-dimensional trapezoid shape in black with a three-dimensional horizontal line in red a light shade within the trapezoid. The triple-notch shape creates two cutouts in the front panel. This feature is symmetrical and appears on both the right and left sides of the device. At the top center of the front panel, the word "DEFENDER" is displayed in red. The matter shown in broken lines, namely, the outline of the device along the front and rear panels are not part of the mark. The broken lines serve only to show the position or placement of the primary features of the trade dress.