M's Butter Up™ Pant

Men's Butter Up™ Pant

The Mountain Hardwear Men's Butter Up™ Pant is a high-performance base layer pant engineered for athletes and outdoor enthusiasts who demand both comfort and capability. Built from a buttery-soft brushed jersey knit fabric (85% Polyester, 15% Elastane), this pant delivers a supple, next-to-skin feel while retaining the stretch and recovery needed to keep up with demanding movement.

Designed with versatility in mind, the Butter Up™ Pant transitions seamlessly from high alpine routes and ice climbing approaches to the climbing gym and winter backcountry terrain. Its slim, layering-friendly fit pairs perfectly under a shell or insulated pant, making it a go-to choice for expedition athletes, ski tourers, and winter campers alike.

The fabric is rated UPF 50, providing reliable protection against harsh UV rays at elevation, while built-in anti-odor and moisture-wicking properties help regulate comfort during high-output activities. At 260 g/m² (7.67 oz/yd²), the brushed jersey knit offers meaningful warmth without unnecessary bulk.

• Brushed Jersey Knit: 85% Polyester, 15% Elastane for a soft, stretchy feel
• UPF 50 UV protection for high-altitude sun exposure
• Anti-odor and moisture-wicking fabric technology
• Easy pull-on elastic waistband with external drawcord for a customizable fit
• Gusseted seat for unrestricted range of motion
• Side entry hand pockets for convenient storage
• Slim fit optimized for layering under outerwear
• Ideal uses: expeditions, ice climbing, skiing/snowboarding, winter camping, and basecamp

Whether you're sending boulder problems in the gym or pushing the limits on a winter alpine objective, the Mountain Hardwear Butter Up™ Pant offers a feel-good, movement-capable fit backed by technical fabric performance.