From the article: "What makes the Defender mask unique is its unusual, spring-loaded design that absorbs shocks. "It's really logical, and it's kind of baffling that nobody came up with this idea before," Flowers said. He compared the mask's structure to a car's suspension system, explaining that the Defender comprises two masks: an outer one (the part exposed to foul tips) and an inner one (the part with padding). The two are connected by the spring system. "When the outer mask is impacted, the springs compress and absorb the majority of the energy; it rebounds," Flowers said. "You feel just a little bit of it. But the reduction is remarkable."" All of the Twins' catchers should try this.