I am tired of freezin my butt off (I cant find evidence of global warmng in Wyoming) when trying to train over winter. I had heard about i-RULE from an AR site. The Tekapos are made of a Merino wool blend and offer good stretch, an optional Coolmax mico chamois and 2 very handy thigh pockets. In really Arctic weather you would want a Goretex outer but the Tekapos have been as warm as; I'd get them to swap out he zips for a stretched cuff over the ankles.