Pacer Fabric Containing PBT, Pacer is the latest generation of chlorine proof fabric. The Maru Pacer fabric is 100% chlorine resistant, fast drying and has excellent shape retention. All of which give you peace of mind that your swimsuit will stay looking great, allowing you to concentrate on your swimming. The Pacer fabric makes this suit not only exceptionally durable, with good shape retention, but also fast drying with total UV protection. This swimsuit is ideal for training and fitness swimming and suitable for fun and activity both in and out of the water.