Filson's washed short sleeve feather cloth shirt by Filson Lures Filson Washed Feather Cloth Shirts The Brooks Review FILSON'S WASHED FEATHER CLOTH SHIRT Washed feather cloth shirt by Filson Blue mussel (Blue) Filson Washed Feather Cloth Shirts The Brooks Review. Filsons Washed Feather Cloth Shirt is an extra soft version of the classic, all natural shirt thats been a warm weather staple for decades. When the day heats up, theres nothing more comfortable against your skin than lightweight 100% cotton, and with this heavily prewashed variant, you can enjoy that exceptional comfort from the first day. Center back box pleat for ease of motion. Button flap expandable chest pockets.