Speedo Junior Boys Lightning Spritz Jammers. Blue Jammers with yellow pattern of left thigh. Speedo logo on the left thigh. Elasticated waist with drawcord. Perfect for training and fitness, Speedo junior jammers comfortably hug the contours of your body to create a smooth, hydrodynamic shape. 100% chlorine resistant, quick-drying and 20 times more fade-resistant than conventional swimwear, Speedo fabric is engineered to keep its shape, swim after swim.