Out layer was made of velcro for easy rolling onto the hair , inner cored was made of soft sponge core for comfortable even rolling through whole the night .
Item No / size /color listed as : NC-0001(13 x 62mm) red , NC-0002(15 x 62mm) dark blue ,NC-0003(20 x 62mm) green ,NC-0004(25 x 62mm) pink ,NC-0005(28 x 62mm) light blue,NC-0006(32 x 62mm) yellow ,NC-0007(36 x 62mm) red ,NC-0008(40 x 62mm) dark blue .