The shirt in the image is a KÜHL Driftr Short Sleeve Shirt, typically found in colors like "Concrete Grey" or "Charcoal Blue".

Key Features:

Design: Button-up short sleeve with a distinctive vertical zippered chest pocket.

Fabric: Ultra-lightweight 64 GSM ripstop fabric with two-way stretch.

Performance: Features UPF 50+ sun protection, moisture-wicking, and underarm eyelets for ventilation.