From Southern Tide:

Guard against the chill with this long-sleeve quarter zip. This thoughtfully constructed quarter-zip pairs set-in sleeves with a two-piece collar for put-together appeal. The elastic back neck tape moves with your body while our premium stretch-enhanced material keeps you comfortable from boardroom meetings to backswings at the driving range.

• Self 2-piece collar
• Exterior raised reflective Skipjack clamp label
• YKK reverse coil zipper
• Skipjack spring loaded SA zipper slider
• Rubber silicone zipper pull with reflective ticking
• Stripe elastic back neck tape
• Set-in sleeve
• 47% Recycled Polyester 47% Polyester 6% Spandex 
• Close all zipper fasteners, turn garment inside out, machine wash cold in garment bag with like colors, gentle cycle, no softener, do not bleach, tumble dry low, remove promptly, cool iron if needed.
• Features: Stretch and Wicking