3.0 mm - ECO Ultra Light SOCK "Ultimate Wear" that everyone will appreciate. Billabons unique 3D heel design creates a perfect hold. High performance thermal brushed for high heat retention. This is the best surf socks that attract many surfers. ★ 3D HEELSYSTEM Unique system that fits perfectly to the round shape of the heel. ★ FURNACE GRAPHENE Nobel Awards new technology promises the best heat conductivity and heat retention performance of the past. ※This product does not have an outer box (packaging), and it will be shipped by small courier. The design may change without prior notice. We appreciate your understanding. Although we strive to make the colors of the product as accurate as possible, the color of the product may differ slightly depending on your computer settings. Please rest assured that there are no significant color variances. We recommend checking for customers in a hurry.