Well made caps that have enough flexibility even in sub-zero temperatures. These flexible ABS covers should mean they are less likely to tear or break when removed or installed. I just put them on a 2011 Honda Accord so I can't comment on the durability of the finish or the possibility of the plastic becoming more brittle over time. The cable tension ring offers 3 ways to adjust how tightly the cover snaps onto the wheel. The clamping ring has NO groove or indentation to accommodate the valve stem. I was able to make a notch in each tension ring and take a closeup photo to show how it is necessary to install the caps. I think it's bad design to notch the plastic cap but not the collet. Also, adding a notch to the ring reduced the diameter a bit, so I had to use maximum tension to ensure the caps fit properly on the wheel. Overall I'm happy with the new look but be warned that there may be installation issues on some applications due to the valve stem.