The ultra-lightweight stretch fabric is durable and breathable. Laser perforation for strategic ventilation. Iso-Chill technology helps dissipate body heat, so the fabric feels cool to the touch. Large back ponytail opening with adjustable fastening. Material Type: Synthetic Colour: White Material: 87% polyester, 13% elastane Technology: Iso-Chill - Specially designed fibers that are flat against the skin evenly disperse body heat and provide instant cooling. The added titanium dioxide absorbs UV rays and quickly dissipates heat away from the body.