100% recycled fabric, lightweight and breathable, perfect for logging the kilometres and staying protected. The Fractel B-Series "SIREN" Bucket Hat is designed in Australia to combat the hottest of running conditions and offers 360 degrees of sun protection. Featuring SWIFTdry sweat absorbing internal headband and UPF +50 panels. A lightweight breathable 4 panel design and a new adjustable rear fastener for all the comfort to go with that style.