The removable arms allow you to adopt your suit to the event temperature and the additional storage means less bulky equipment floating about highlights versatility removable neoprene arms front zip allows for a great swim and freedom on the run flexibility 15mm thick neoprene shoulders 2mm arm and crotch panels make this suit super flexy for not only the swim but also the run so there is no bulky neoprene getting in the way of your stride buoyancy 9mm front leg panels provide the buoyanc