Mephisto’s end-of-season sale has discounts of up to 50 percent off on shoes for men and women, including sandals, sneakers, and formal shoes.

Mephisto shoes are treasured for their comfort and stubbornly unfashionable authenticity. Photo: Alexandra Nataf/Wenzel & Co Mephisto, the ultimate grandpa brand, is suddenly, improbably cool.

If Mephisto was game to work with Mr. Procell, it was in part because the company has arrived at a moment when the shoes’ stodgy nature is making them desirable.

Mephisto’s history goes back to 1965, when Martin Michaeli, who had spent time in New England with shoe makers, wanted to create a footwear brand.

ORTHOPEDIC-CHIC Four comfy and appealingly untrendy pairs of shoes that might entice both great-uncles and millennials. From left: Mephisto Shoes, $235, endclothing.com; Shoes, $225, keenfootwear ...