For the modern gentleman who's usually at home, cozy, and kicking back with a drink and a book by the time he realizes he's forgotten to take the dog/trash out, here's the solution: a super-hip slipper than doubles as a light-wear street shoe as soon as you kick on a detachable sole. Genius.
Mahabi, which bills itself as making "slippers for the 21st century," have redesigned cozy footwear from the ground up, adding collapsible neoprene heels, and a Toms-esque design in addition to the aforementioned detachable sole, which snaps on in a second and is available in a range of colours from gold to Gotland Green. The breathable, wool-lined upper is lined with a cushioned sports style in-sock, making them even easier to slip on, according to manufacturers. (For more on how this works, exactly, here's their FAQ)
This kind of cozy versatility for your tootsies doesn't come cheap: Mahabis will run you $79.50 - $106.37, and are available exclusively via their online shop. Howard Hughes would approve.