They may feel soft when theyre on but theyre reassuringly secure too with their drawstring waist the black boom splice aquashort is designed to last longer and keep their shape for an enhanced fit plus they resist fading longer than any other swim material too endurancereg designed to last longer endurancereg uses a blend of pbt and polyester fibres which help to provide high chlorine resistance longer lasting fit through wear and use and resists snagging and fading for longer tha