Dark stone wingback bedThe Dark stone wingback bed, which comes in headboards and whole platform beds, adds a striking linear theme to the traditional shelter bed profile with deep vertical channeling and welting elements. The yarn dyed polyester linen used to create the upholstery fabric Dark Stone contains contrasting beige and gray threads. Feature and quality The bed can appear cozier and more pleasant by adding a soft, cuddly covering with upholstery fabric and yarn.