Thank you for viewing. Far Infrared Eco-Cera Shoe Insoles (for women) Thin type. I received this as a gift, so I haven't opened the contents. I will ship it as is, so please consider purchasing if you understand. Quoted from the internet ↓ Approximately 25 x 8 x 0.3 cm Box approximately 27 x 10.2 x 1.7 cm Weight: Approximately 24g Core material = felt, insulation material = aluminum silicate soda glass (ceramic beads), surface fabric = cotton/polyester blend ・Compatible size up to 25.0 cm ・Made in Japan Ceramic beads are applied to the front and back of the felt, and the top and bottom are secured with fabric. The ceramic beads on the bottom block cold air from below, and the ceramic beads on the top radiate far infrared rays with the temperature of the foot, providing high insulation and continuously warming the feet. It eliminates 95% of bad odors, and the (negative ions) emitted by the ceramic beads harmonize with the (positive ions) emitted by the three major elements of bad odors (ammonia), (acetic acid), and (isovaleric acid), eliminating the odor. Free shipping Instant purchase OK