... .material:EVA 2.size:36"*6",24"*6".18"*6,and so on 3.color:blue,black,grey,red,yellow,etc ... roller1.material:EVA2.size:36"*6",24"*6".18"*6,and so on3.color:blue,black,grey,red,yellow,etc it ... used for adults to make yoga exercise or other oxy sports.and more and more popular for people all over the world.our ... many kinds of type.for example:36"*6",24"*6"and so on. eva foam roller