Long Sleeve Shirts by BP. Add to WardrobeRemove from Wardrobe FavoriteUnfavorite Shop It Outfits Sort by featured Sort by price: high to lowSort by price: low to high BP. Plaid Knit Flannel Shirt $35 $59 BP. Plaid Knit Flannel Shirt $35 $59 BP. X Alex Costa Plaid Flannel Shirt $24 $49 BP. Duofold Longline Plaid Button Up Shirt $24 $49 BP. Duofold Longline Plaid Button Up Shirt $24 $49 BP. Gart Dyed Button Up Shirt $49