1. eco-friendly pu material 2.cold and hot resistant,durable waterproof,easy to clean 3.colors,design,size ... . It protect the knees from hard,rough,wet, cold and hot surface, it can be used in garden planting, when mending the ... and flavorless, discarded PU hassock can be biodegradable over time2.hot and cold resistant,waterproof, wearable and durable3. easy to move ...