An on-trend neon silk shirt is styled with seamed patches on the front and a shirttail hem to add a chic and modern accent to the airy style.An on-trend neon silk shirt is styled with seamed patches on the front and a shirttail hem to add a chic and modern accent to the airy style. Color(s): neon shell. Brand: theory. Style Name: Theory 'Duria - Double' Silk Shirt. Style Number: 554418_1.