The Fox Flexair Delta SS Jersey delivers the ultimate in lightweight speed and performance. Polartec® Delta™ technology is engineered with elevated structures knit across the fabric surface to increase airflow, reduce friction, and dissipate heat. The densely knit sleeves of the Fox Flexair Delta SS Jersey provides a close fitting and added abrasion resistance. Laser perforated vents throughout the jersey add additional airflow for even more warm-weather comfort. The jersey has a contoured fit with 4-way stretch for maximum mobility. It's a jersey that's so light and breathable you might forget you're wearing it. Fox Flexair Delta SS Jersey  Polartec® Delta™ enhances your body's natural cooling system. Bonded cuffs and collar for complete comfort. Heat transfer logos.? HPS 31 Fox Flexair Delta SS Materials Material: 51% Polyester 45% Rayon 4% Elastane? Polartec® Delta™ 51% Polyester 45% Tencel 4% Spandex?