SPEEDO Male Sonic Warm Up Jacket Constructed of super-soft fabric for kicked-back comfort. Think of them as your reward after a great workout. Mesh panels provide cool ventilation. Made of soft poly knit with brushed inner fleece. Cool media pocket holds your Aquabeatu00ae. Cord loop located inside for hassle-free headphone cord management. Side zip pockets located on the outside. Fabric: 100% Polyester.