Photo: Melissa Hom

Simply stated, Piazza Sempione makes the world's best pants. Italian tailoring at its finest, this company founded in 1991 has been making clean, chic styles that are a must in every wardrobe. Here are five reasons we can't live without them:

1. The fit is superb.
2. They easily go from day to night — you can go anywhere, anytime in these.
3. You can count on finding your favorite style season after season.
4. Beautiful fabrics add to their comfort and longevity.
5. They're well priced for the great quality you get.

The "Audrey" pant in navy velvet and charcoal cotton, $365 to $600; available at Saks, Bergdorf Goodman, and Barneys.