The womens Speedo Boom Allover Muscleback swimsuit is a bang of style when hitting the pool. Made with a chlorine resistant Endurance10 fabric technology developed to protect you from chlorine. Muscleback design offers flexibility and freedom of movement, so you can train in comfort. Fully lined with contrast colour and a 4-way stretch fabric for no restrictions. Durable and Quick-Drying Soft to touch and more resistant to sunscreen than traditional swim fabrics. Medium Leg Rise.