Breathe quickly and steadily in Spyder's Alps Longsleeve Tech Baselayer. This sporty shirt is made from a blend of polyester stretch jersey fabric and stretch mesh for cool, fast-breathing performance during intense, warm-weather activities. Both fabrics feature Spyder's DryWEB? moisture management technology so your perspiration keeps moving instead of drenching you uncomfortably. Flat-lock seams increase comfort for no-irritation wear.