The cross and back portions are stretchy. The soles of the feet, which have the a.v.v letters, have a slightly squishy and bouncy feel. I purchased this unused and used it once, but it didn't fit my feet, so I've been storing it. Size is listed as 24cm, but the size notation is L. Color: Black In image 6, it's a cork pattern, not actual cork. Please check the images and purchase. Shipping is planned via Yu-Packet Plus. Instant purchase OK. Color: Black系 (Black-based)