Speedo Essentials - everything you need for a great swim. Take on your training wearing the sleek navy Dive Thinstrap Muscleback featuring an eye-catching turquoise and pink colourblock side panel and contrasting turquoise neckline and straps. A great choice for your workout, the muscleback design with thin straps offers flexibility and freedom of movement. Offering higher chlorine resistance than standard swimwear fabrics, our shape-retaining Endurance10 fabric fits like new for longer with CREORA® HighClo. Thin strap muscleback design - aids shoulder movement and offers increased back coverage Higher chlorine resistance than standard swimwear fabrics - fits like new for longer with CREORA®