This collapsible roller closes into itself with interlocking technology that allows it to perfectly align after every use. Unlike the traditional bulky foam roller, this unique design was built to create easy storage and portability. Its expandable capabilities only increases the functionality of this fitness tool. When this roller is collapsed, it is small as 13 CM. When it is open to its fullest size, it can reach up 39 CM and endure up to 130 KG of pressure