A smart, insulated flannel shirt that will soon become your everyday essential. The Sinclair Insulated Flannel has all the trappings of a regular ol’ flannel button-up, but it has a secret weapon you can barely notice from the outside: It’s stuffed with 40 grams of Spaceloft synthetic down insulation for added warmth.
![Flylow Sinclair Insulated Flannel - Men's Copper/Redwood, M](https://flylowgear.com/cdn/shop/files/Summer_65off_Mens_350x.jpg?v=1695848563)
Men's Long-Sleeve Flannel Shirts & Midlayers
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Flylow Sinclair Insulated Flannel Black/Pine SM at Men's
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Flylow Sinclair Flannel : Clothing, Shoes & Jewelry
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Flylow Men's Sinclair Insulated Flannel - Bear - M
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Flylow Sinclair Insulated Flannel Black/Pine SM at Men's
A smart, insulated flannel shirt that will soon become your everyday essential. The Sinclair Insulated Flannel has all the trappings of a regular ol’ flannel button-up, but it has a secret weapon you can barely notice from the outside: It’s stuffed with 40 grams of Spaceloft synthetic down insulation for added warmth.
![Flylow Sinclair Insulated Flannel - Men's Copper/Redwood, M](https://flylowgear.com/cdn/shop/files/F23_SinclairInsulatedFlannel_CopperRedwood_Front_grande.jpg?v=1692054228)
Flylow Sinclair Insulated Flannel - Men's Copper/Redwood, M
![Flylow Sinclair Insulated Flannel - Men's Copper/Redwood, M](https://flylowgear.com/cdn/shop/files/BakerInsulated-crop_350x.jpg?v=1694725648)
Men's Long-Sleeve Flannel Shirts & Midlayers