This item has been opened once for inspection and photography, but it is a new, unused item. Color: Navy Size: S The following is quoted from the web page: ■ BRING underwear combines the smooth feel and odor resistance, and temperature regulation of merino wool with BRING Material's recycled polyester, resulting in underwear with a meltingly soft touch. It's free size, so it's surprisingly genderless for underwear. Moreover, it's reversible front and back. Some people even wear it for four days, using both sides and the front and back. It's washable wool, so it's easy to maintain, and it dries easily because it's a polyester blend. There are two types to choose from, depending on the wool content. 70/30 is 70% wool and 30% recycled polyester. It's suitable for situations with relatively low activity levels, such as mountain climbing. 50/50 is 50% wool and 50% recycled polyester. It's suitable for high-activity activities, such as running in the mountains for long periods.