Our popular junior Jammer, updated. Weâ€ve given our much-loved black Endurance+ Jammer a style update with standout white branding. Retaining the streamlined cut and internal drawcord waist that make it so comfy during lessons and training, itâ€s quick to dry and 100% chlorine resistant. Newly updated, one of the Polyester yarns in the Endurance+ fabric is made from 100% post-consumer waste, such as recycled plastic bottles.