River Shirt reframes a button shirt as a lightweight running layer, using Japanese recycled microtwill with mechanical stretch.
The smooth fabric dries rapidly, manages moisture and odour, and resists abrasion and UV exposure. Invisible snaps keep the front clean, while flat seams and shaped cuffs reduce friction through repeated arm movement.
Two chest pockets carry small essentials. A pair of upper-back ice pockets adds mid-run cooling and doubles as discreet storage once temperatures settle.
