What Our Gearhead® Experts Are Saying:"I’ve worn the Pines Microgrid Ultra-LT Crew on big elevation days—trail running, touring, even under a shell for spring objectives. It’s crazy light, dries fast, and breathes way better than wool. The thumbholes and stretch fit make it perfect for layering without any bunching or riding up."When we’re pushing hard in cold air at high elevations, the Backcountry Pines Microgrid Ultra-LT Baselayer Crew Top delivers the lightweight warmth and moisture control we need to stay focused. Athlete-inspired and mountain-tested, this next-to-skin layer balances breathable performance with a soft, streamlined feel that moves naturally with us through every stride and transition. The partially recycled poly/spandex blend features a microgrid fleece back for low-bulk warmth and a smooth face for easy layering. Flatlock seams and raglan sleeves with integrated gussets eliminate chafing and allow full range of motion, while HeiQ Fresh FFL odor control keeps things fresh through multi-day missions. Whether we’re skinning toward a ridgeline or racing the sunset on a trail run, this crew keeps us warm, dry, and ready for the next move.