The Men's Classic Thermal Merino Base Layer Bottoms are made from a heavy weight wool fabric which will help keep you warm and comfortable as you ski, run, hike and explore the great outdoors.Merino-covered elastic waistband and traditional fly designAllSeason - suitable for year-round wearComfortFit - enhanced comfort and breathabilityExtended back length for complete comfortExcellent odour resistanceUPF 40+ UV protectionLong sleevesFlatlock seam construction Size M inseam: 30" (76 cm)Weight: 180 g/m²Fit: RegularFabric: 87% merino wool, 13% nylon_