Twin Professional Dog WalkersThe Twin Pro is APMA accepted, built by hand via stapled construction, and has an anti fatigue rocker bottom that sets feet in a forward motion for shock absorption and energy return. it's asymmetrical design, unique to the left and right shoe, offers a playful option in the Professional. Details: Leather and or fabric uppers Padded instep collar for comfort when walking Roomy reinforced toe box for protection with plenty of "wiggle room" for your