Men's Long Sleeve Tops

Light, comfortable trim-fit base layer for mixed output in cool temperatures. The base layer crew – the foundation of your system. Made for mixed o...

Performance base layer for lower output activities in cool to cold temperatures. Comfort starts with your base layer. Made for performance during l...

The Astroman Long Sleeve Sun Shirt is named after the legendary route in Yosemite Valley, featuring our best-selling lightweight, stretchy, and dur...

An incredibly warm merino wool base layer for the coldest months of the year, the Merino 260 Tech Long Sleeve Half Zip is a go-to piece for winter ...

A warmer, midweight version of our best-selling Oasis, the 260 Tech Long Sleeve Crewe is a go-to piece for winter layering, made with 100% merino w...

A classic plaid flannel shirt made with organic cotton and coconut buttons. Fit Regular Composition-52% organic cotton and 48% conven...

Our versatile, go-anywhere shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe is our best-selling base layer top. ...

Our most breathable tech tee offers cotton-like softness and moisture-wicking performance for all-day comfort and versatility in the mountains and ...

Setting the standard for all others to follow, the Merino 200 Oasis Long Sleeve Half Zip features our most versatile merino wool jersey fabric ...

A staple for any climber’s wardrobe, this long-sleeve is made with a breathable heavyweight cotton fabric for long-lasting comfort and durability. ...

Made of recycled polyester with a bit of stretch, the Bitterroot is a durable, breathable sweatshirt upgrade. Wear this medium-weight waffle layer ...

We've updated the fit of our Men's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of ou...

There’s no running from the LAW™. Our exclusive, cotton/tencel blend takes flannel comfort to a whole new level. Soft, durable, and warm, the LAW™ ...

Luxuriously soft, lightweight, and breathable, the DESCENDR™ Flannel is your go-to for all-day comfort and warmth. Our versatile, everyday design e...

This shirt's winning (unofficial) awards with its super soft organic and recycled cotton fabric. The lightweight herringbone weave's got great drap...

Breathable climbing overshirt that works on and off the rock. Workwear inspired, the Cronin Cotton Stretch Overshirt is built for climbing. Durable...

The Echo Long Sleeve Tee is built from ultralight bluesign®-approved recycled materials, perfect for everything from fall running and spring ski to...

Lightweight, moisture-wicking long-sleeve tee for hard efforts in the mountains. Designed to handle the gamut of high-output mountain activities, t...

Our elevated Jeffreys Pique fabric takes on a new form in the Men’s Jeffreys Overshirt. Ideal for layering in cooler seasons, this lightweight flee...

A true farm-to-flannel, the Fjord Flannel Shirt is built from soft but durable 100% organic cotton. Designed for daily living and layering, it has ...

For days when you need a light layer, the Dolberg Flannel Shirt has you covered. The lightweight flannel is made from 100% organic cotton for added...