A single layer can have a bigger impact than you think. Mountain Hardwear's go-to, packable long sleeve houses the highest warmth-to-weight ratio of any fabric in our line, along with high breathability, conveniently comfy thumb loops, and a secure zip pocket for stashing essentials. This unique active mesh construction consists of hollow, tube-like fibers that absorb sweat quickly and efficiently—supporting insulation and heat-shielding properties to keep you temperature-regulated from the trail to the lift, and everywhere in between.

• Brushed back mesh made with a hollow core yarn that provides breathability to keep you cool and comfortable
• Anti-odor finish
• High warmth-to-weight ratio
• Secure zip pocket front left
• Easy to layer under outerwear or wear on it's own
• Thumbholes made with a soft knit fabric construction
• MHW heat transfer logo at left chest
• Reversible to allow for two levels of warmth when worn reversed with backer faced out creates more airflow and keeps you 28% cooler