BAKUNE series eye masks that support a comfortable sleep environment. Gently warms and promotes blood circulation. Working on smartphones and PCs puts a strain on your eyes without you realizing it. The "BAKUNE EYE MASK" uses a specially developed material to warm the eye area and promote blood circulation. It uses "SELFLAME®︎", a special functional fiber that uniquely blends ultra-fine ceramic powder. This special fiber radiates its own body temperature, gently warming the eye area to a comfortable temperature. - Brand: TENTIAL - Product Name: Eye Mask - Series: BAKUNE - Features: Supports a comfortable sleep environment Thank you.