The Equi-Librium AIR is available in front and hind patterns: scientific studies prove the Equi-Librium principle smooths the process of hoof unrollment. Equi-Librium AIR provides additional key features including: Newly designed front pattern is approximately 15% lighter than standard Equi-Librium. Rolled toe, more pronounced in the hind model. Concave section through the toe provides extra ground purchase. Added width in the heels for extra support. Quarter clips in front shoe are positioned between the first and second nail hole providing additional stability to hoof and fit while maintaining optimal hoof mechanics.