Maru xt3 viper jammers junior boys these maru xt3 viper jammers are a great choice for a streamline experience in the pool the jammers feature an elasticated waistband an internal drawstring fastening and a stretch fit with flat lock seams for limited irritation to the skin a colour block style features two colours with contrasting seams to the front junior boys jammers elasticated waistband internal drawstring fastening stretch fit flat lock seams contrasting stitchin