Walmart continues to offer the Essentials by Isotoner Men's Microterry Slip-On Slippers in Brown for $3.88. Opt for in-store pickup to avoid the $5.99 shipping fee. That's tied with last week's mention as the lowest price we've seen. (It's also the best we could find for any such slippers by $18.) These machine-washable slippers are available in S only.