Klim Mesa Falls Wool Long Sleeve Shirt

The Mesa Falls Wool Long Sleeve Shirt is a lightweight, performance-oriented long sleeve shirt designed as a next-to-skin or base-layer piece for outdoor activities, casual wear, or layered riding use. It blends natural wool comfort with technical fabric features to balance warmth, breathability, and movement.

Key Materials & Fabric

• Made from a jersey knit blend of Merino wool and nylon: this gives the shirt thermoregulation (helps keep you comfortable across a range of temperatures), natural odor resistance, and breathable warmth.

• 18.0-micron Merino wool provides soft, comfortable performance next to skin.

• Fabric weight is about 145 gsm (4.3 oz/sq. yd), meaning it’s a lightweight piece suitable for layering or year-round use.

Design & Fit

• Regular fit — comfortable without being overly tight, good as a base layer or standalone top.

• Engineered stretch gives freedom of movement for active use.

• Offset shoulder and side seams help reduce bulk under jackets and minimize seam chafing during long wear.

Performance Characteristics

• Thermoregulation: Keeps you warm in cool conditions without overheating in milder temperatures.

• Breathability: Merino wool naturally lets moisture escape, helping you stay comfortable when active.

• Odor resistance: Merino wool naturally resists odors, so you can wear it for extended periods without it smelling as quickly as some synthetics.