At its core, the Horse Portable is a modular, heavy-duty rubber mat system. However, calling it a "mat" is like calling a Swiss Army knife a "piece of metal." The system consists of interlocking, highly durable puzzle-piece tiles made from a specialized elastomer. Unlike stable mats that weigh 100 pounds and crack in the cold, the Horse Portable is engineered for three specific virtues: grip, hygiene, and mobility.

Petra Biehle is still innovating. Recent patents show she is working on a "Smart Horse Portable" that integrates pressure sensors to monitor a horse’s weight distribution, alerting owners to lameness before it is visible. She is also testing a fire-retardant version for use in commercial stables.

The success of Petra Biehle and the Horse Portable has forced major equestrian brands (like Horseware and Schockemöhle) to develop their own portable flooring. However, professionals continue to pay the premium for Biehle’s original design because, as one Olympic groom put it: "I’ve seen a knock-off mat fold like a taco under a panicking Thoroughbred. Only Petra’s mat stays flat when it matters."

It is impossible to discuss the Horse Portable without the qualifier Petra Biehle. In the equine industry, "Buying a Petra Biehle" is shorthand for buying the original, high-quality system. Sadly, due to her success, dozens of Chinese knock-offs have flooded Amazon. These imitators use recycled rubber that degrades in sunlight or foam that retains bacteria.

Authentic Petra Biehle and Horse Portable products are distinguished by: