By Malene Birger Rolla Hat in Black. Size all. Ripstop fabric with faux fur trim. Strap and buckle closure which closes either under the chin or above the top. Water-resistant cotton shell.. OS measures approx 28.26 in circumference. BYMA-WA33. 103701. As the first Danish designer to launch a haute couture line, Malene Birger is at the top of her game with representation in over 15 countries world wide. With a classic elegance expressed with edgy, sexy sophistication, her line echoes style icons from the past transformed to present day extravagance.