Soft rubber caster wheels provide superior rollability and quiet operation. Soft rubber wheels are a popular choice among many studio, hospital and other institutional applications where quiet rolling is important. Soft rubber wheels are made of a high impact hard rubber core that is bonded with a soft rubber tread. One downside to be aware of is that the soft rubber tread may permanently compress into a flatspot if carrying a continuous load. Soft rubber wheels are a great choice for a variety of different floor surfaces. The durometer on these wheels allow them to roll over obstacles such as elevator and floor gaps, cords and the cracks with ease.