The same high-performance fit, now in two shapes – Original, for most users, and Biodynamic, for our widest toe splay. ORIGINAL SHAPE™ // Secure midfoot and heel with a wide toe box. Found in most Astral shoes. Great for those looking for a combination of security and stability, and/or curious about natural shaped shoes. BIODYNAMIC SHAPE™ // Secure midfoot and heel with a wider toe box than Astral’s Original Shape™. Found in the new Nosobo™ and Techyak™. Great for those putting in a lot of miles, and/or fully committed to naturally shaped shoes.