The Mountain Hardwear Men's Compressor Pants are ideal for cold tent-bound spells and acclimatization days in base camp, and can be worn when you're on the move or while belaying as well. These Thermal. Q-insulated pants protect your legs from the harsh cold of high-altitude peaks, and they pack down easily. Full side zippers make it easy to get in and out of them with boots on, and the reinforced seat and knees boost durability.