A reader wrote a week or two ago asking about the propriety of seersucker neckties. I replied that I hoped they are OK because I wear them in summer. Here's an example.
The necktie in the photo is a nicely puckered 65% silk and 35% cotton seersucker from Nicky of Milan, and I wish it was easier to find more of that blend as I like my ties a bit narrower these days. The silk adds a lustre that isn't present in pure cotton neckties. It's paired with a blue end on end shirt, a pocket square of gold silk and a black and white tropical weight suit. On the feet, distinctly American saddle shoes.