The real thing, made in Spain, in the village of La Rioja according to the website.
If you don't believe me, take a look at this image heisted from Heavy Tweed Jacket. It's from High Holy Brooks Brothers, in the High Holy Year of Our Preppy Lord 1982. Not only does it feature rope sole espadrilles, but also poly/cotton shorts and a damn hoodie. I rest my case.
Lest you think I've given up the ghost and gone full blast casual, know that later in the same day I wore a vintage Brooks Brothers white oxfrod with unlined collar, Brooks Brother blue oxford pants, a yellow cotton striped knit tie, vintage 1980s from Lands' End Charter Club, and the infamous gossamer jacket that has been getting perhaps too much time in the rotation. Damn thing is comfortable, what can I say? Different clothes for different circumstances.
Don't romanticize the past, and don't tie yourself up in imaginary rules. The old guys we all revere knew how to look good in a suit and in shorts. The real trick lies not so much in knowing all the little details as it does in knowing when to employ them.
p.s. give 'em enough rope: