2 NEW Pottery Barn Alba Reversible Pillow Cover Cove Blue. Crafted of pure cotton and dyed in easy-to-layer hues, these decor staples provide the perfect foundation for endless pillow pairings. The colored front panel overhangs a plain reversable back, making for two looks in one. Made of 100% cotton flax linen in a overdyed Cove Blue or Thyme Green finish. Reverses to solid Oatmeal Gray. Zip closure.