Jeremy D.wrote a review of Mountain Hardwear Beta Power 1/4-Zip Shirt - Long-Sleeve - Men's on January 2, 2013
Familiarity: I've put it through the wringer
Warm, stretchy, soft, and smooth: goes everywhere I go, from treks through the Sierras to hunting for Pow stashes on Granite Chief to multi-pitch climbs, and looks as beautiful as the day we met - no, I'm not describing the ultimate girlfriend, I'm talking about the Mountain Hardwear Beta Power shirt - the ultimate baselayer!
I've had one of these for years, and I take it literally everywhere. It's an older model, I'm not sure if it's quite the same as the one described here (mine has 11% Elastan, a zippered pocket on the side, and thumb holes on the sleeves). I can't even begin to describe how comfy this shirt is! I would give it 6 stars if I could! It's definitely worth the price!