A must for long morning walks and cozy winter weekends, The North Face Arroyo heavyweight flannel shirt feels great, and its organically grown cotton also makes you feel great.

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A warm, breathable mid layer for cold conditions with body-mapped grid fleece fabrics offering insulation, temperature regulation and mobility, the Rab Ascendor hoodie is ideal for technical ascents.

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Built with Thermic™ S stretch fleece and made with over 90% recycled fabric, the men's Rab Ascendor Light hoodie is a high-wicking, lightweight and warm fleece mid layer for challenging ascents.

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With classic heavyweight style and a hood to match, the prAna Asgard hooded flannel shirt for men takes the chill out of cool days and layers nicely over a classic T-shirt.

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A go-to for urban outings, far-flung travels and trail adventures, this men's Outdoor Research Astroman long-sleeve sun shirt keeps you moving with easy stretch and UPF 50+ sun protection.

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Sunny crag days get a little bit better in this button-up. With built-in UPF 50+ sun protection, the men's Outdoor Research Astroman sun shirt protects you from harsh rays while on the wall.

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There's a reason it's a bestseller. The men's Outdoor Research Astroman technical sun shirt delivers UPF 50+ protection and ultimate stretch for all your trail and urban outings and travel adventures.

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Providing options for changing weather, the Free Country Atalaya Flex Super Softshell 3-in-1 Systems jacket combines a soft-shell outer jacket with a removable polyester puffer liner jacket.

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Outsmart the elements in the all-season, weather-resistant Janji Atlas Tech men's pants. Lightweight, super stretchy and fast-drying, they're made to move—and easily pack away when the sun returns.

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A light layer that works hard to wick sweat, the men's Brooks Atmosphere long-sleeve shirt provides cool coverage you can barely feel. It also dries quickly for lasting comfort.

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Add the men's Brooks Atmosphere shirt to your race-day or hot-weather gear and let its ultralight, breathable fabric do its work keeping you cool.

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As versatile as your adventures are varied, the men's Arc'teryx Atom LT Insulated hoodie with Coreloft™ Compact 60 insulation has been redesigned for better durability, resilience, comfort and fit.

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Depending on conditions, you can wear the men's Arc'teryx Atom LT jacket as an outer layer or a mid layer. Its light insulation and air-permeable side panels are ideal for medium-output pursuits.

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Warm weather is never a constant, even in summer. Superlight and packable, the men's Arc'teryx Atom SL Insulated Anorak hits that zone where conditions are mild, but insulation is required.

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