Shop our entire Arena Womens One Piece Swimwear collection online! The Arena Water Instinct range of Arena swimwear offers an Arena One Piece swimsuit line for women. Arena Womens swimwear offers Arena one-piece swim for women that is both comfortable and durable. The Arena One Piece swimsuit range for women has also been designed with training athletes in mind. A popular choice from the Arena Womens one-piece range includes the Arena Womens Arena One Biglogo swimsuit, which is available in a variety of colours and prints. Swimmer is an official Arena Australia stockist.