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The Alpine Onset 150 Base Layers are a lightweight insulator, featuring soft merino wool blended with recycled polyester for superior moisture wicking and durability and are the foundation for an elite performance outerwear kit.
Outdoor Research® gear is guaranteed to perform throughout the lifetime of the product.
Free shipping on orders $99+! Need it by the holidays? See our shipping page for all deadlines. Plus, extended returns through 1/31/25. Final sale items are not eligible for return.
The Alpine Onset Merino 150 T-Shirt is your go-to base layer for early morning starts and afternoon bike rides, whether you're headed up a 14er or cruising to the market. The soft and breathable fabric comprises 47% recycled polyester and 47% wool, with just a touch of elastane for stretch. The natural wool fibers are perfect for regulating temperature, while the recycled polyester keeps things lightweight and quick drying. UPF 30 protects you from harmful sun rays, and the flat-seam construction ensures chafe-free comfort all day long. Built with lightweight, breathable comfort for any activity, the Alpine Onset Merino 150 T-Shirt is an essential addition to any closet.
*All sizing is based on your body measurement.We adjust the garment for intended fit and intended use.
Apparel that skims the body for an athletic fit.
