Matter wheels are some of the best speedskating inline wheels on the market. Matter is an innovative brand, who gets things done. It was Matter wheels that assured that 110mm wheels became legal. Many have tried to do what Matter has done, and for that reason, many wheel manufacturers have copied Matter's look, but none have been able to produce wheels of the same standard. One of the reasons for Matter's success is the fact that they define the wheel by the footprint instead of the hardness.
Why footprint instead of hardness? Footprint is more important than how hard the wheel is. Footprint is the compression size. In other words it's the amount of wheel that makes contact to the surface. This depends on the person's weight, speed, temperature and becomes even more important when you are on the side of the wheel doing turns or doing the double push. The smaller the footprint, the harder the wheel.