The XL white pair are ex display therefor not pristine white, so cheaper. 
 
The boot features outer and inner strike guard protection. Inside the strike area is a layer of ARTi-LAGE - the latest in impact protection designed to protect your horse. This proprietary technology offers maximum protection with unique molecular properties designed to create a soft and flexible shock absorbing barrier.
 
When at rest the molecules flow freely allowing the horse to move, however on impact, they lock together to absorb energy and reduce the force transmitted, passing the trauma away from the horse’s leg.
 
This allows for greater protection when impact increases but never interferes with the horse's natural movement. In tests ARTi-LAGE outperformed other leading impact protection foams. A reinforced outer strike area gives protection against rubbing and interfering while the inner ARTi-LAGE protects bone, tendon and soft tissue.
 
The boots are finished with a high quality double stitched finish and a built-in stitch channel to avoid separation. The tough binding and finishes make a boot that is tough enough to stand up to everyday use. Unlike traditional sport boots made from 'hook and loop' outer material, these boots are perfect for trail as they won't pick up twigs, grass and burrs that usually stick to fabric boots.
 
The perfect all round boot.
 
Full fitting guide at http://www.majykequipe.com/fit-your-horse.html