Now that it has become socially acceptable to wear slippers outdoors — to the grocery store, to school, out to dinner — the market is flooded with all manner of furry, fuzzy, and cozy options.

If you dream of sinking into a supersoft hotel bed every night but don’t want to spend Ritz-Carlton money to buy a whole new mattress, you could do with a plush mattress topper. Mattress toppers ...