The "Sozai to iro “Smooth Top" is knitted with 100% silk on the inside that touches the skin and 100% cotton on the outside, and the elastic at the top of the opening has been eliminated to increase the overall elasticity. Two new colors, strawberry burgundy and teal bordeaux, have been added to the material and color Melange -Smooth Top-. The combination of silk and cotton colors creates an expressive and unique color. Please try it out. For details, please see the product page .