From Seamwork:
Bertie is a sweet and feminine shirtdress full of special details, like a V-neckline, center front button placket, elasticized waist, and full-length sleeves gathered into tied cuffs.
Match your favorite buttons to lightweight or medium-weight woven fabrics, like shirting, chambray, flannel, lawn, voile, rayon challis, Tencel, or silk crepe.