Unshrunk, merino wool and polyester hybrid baselayer. Merino wool has the same heat and moisture management properties as well as the highly functional polyester wicking and quick drying processing, so it wont get stuffy and dries sweat quickly. In addition, it has been treated to further enhance the antibacterial deodorizing function of the wool, so it is resistant to odors even during long periods of mountains, and is durable to maintain a high deodorizing effect even after repeated washing. Merino Spin Thermo uses a double-layer bagged construction that maintains a warm air layer between the layers of the fabric to keep you warm for those cold winter activities. Great for winter climbing, ice climbing, BC skiing, snowboarding, and many other activities. Size (nude measurements/cm)M: Waist 29.5 - 31.9 inches (75 - 81 cm), Hips 35.8 - 38.2 inches (91 - 97 cm), Inseam 29.1 - 31.5 inches (74 - 79 cm), Material: 65 % polyester, 35 % wool; Weight: 6.0 oz (170 oz (170 g); Country of Origin: Japan *Made in order to make this product lightweight and features a delicate knit fabric for optimal functionality. Repeated friction, hook hook hook and loop or branch or contact with hard objects may cause damage to the fabric. In addition, the knit fabric is prone to shrinkage after repeated use and washing, especially in tumble drying as there may be significant shrinkage.