The shoe is stitched together inside-out like a small bag, then turned right-side out — the lightest, most unstructured construction there is.
By Ambrogio Shoes Editorial, in consultation with Ambrogio's Spain-based shoemaking team
· Updated July 8, 2026
Bologna construction, also called sacchetto (Italian for "little bag"), sews the upper and lining together inside-out, then turns the whole assembly right-side out before attaching a thin, flexible sole — with little to no rigid lining, stiffening, or lasting board inside. The result is the lightest, most unstructured shoe construction available, prized for soft, unlined summer loafers and driving shoes but offering minimal structure, support, or durability compared to lasted constructions like Blake or Goodyear welt.
Illustrated cross-section of Bologna (sacchetto) construction showing the shoe sewn inside-out like a bag, with no rigid insole, then turned right-side out
Built Like a Little Bag
Bologna construction takes its nickname — sacchetto, Italian for "little bag" — from exactly how it's built. Instead of lasting the upper over a rigid form the way Goodyear-welted or Blake-stitched shoes are, the upper and lining are stitched together inside-out, much like sewing a small pouch. That inside-out assembly is then turned right-side out, and a thin, flexible sole is attached to the bottom. There's little to no internal lasting board, stiff heel counter, or rigid insole — the shoe is, structurally, closer to a soft pouch for the foot than a built-up dress shoe.
Why Give Up Structure
The entire appeal of Bologna construction is softness. Without a rigid lasting process or internal stiffening, the shoe drapes and folds with the foot almost immediately, with none of the break-in period a structured welted shoe requires. That makes it ideal for warm-weather, low-formality footwear — unlined loafers, driving shoes, soft slip-ons — where the goal is a barefoot-like feel rather than the support and shape-holding of a formal dress shoe.
The Trade-Offs
That same lack of structure means Bologna-constructed shoes offer less support, less water resistance, and less overall durability than lasted constructions. The thin sole wears through faster, there's minimal protection from wet ground, and the unstructured upper simply can't be reworked as many times as a shoe built around a proper insole and welt. It's a deliberate trade: comfort and lightness for structure and longevity — the right choice for a summer loafer, the wrong choice for a shoe expected to handle daily commuting in any weather.
Comparison
Bologna (sacchetto) vs. Goodyear welt: Goodyear welt is built for structure, water resistance, and indefinite resoleability. Bologna construction gives up all three in exchange for a soft, unstructured, barefoot-like fit best suited to warm-weather, low-formality footwear.
Frequently Asked Questions
Why is it called "sacchetto"?
Sacchetto is Italian for "little bag," describing the technique itself: the upper and lining are sewn together inside-out like a small bag, then turned right-side out before the sole is attached — rather than being built up over a rigid last the way most other constructions are.
Is Bologna construction durable?
Less durable than lasted constructions like Blake or Goodyear welt. There's little to no internal structure supporting the foot, and the thin sole wears faster. It's built for comfort and softness in low-stress, warm-weather wear, not for hard daily use or bad weather.
Can a Bologna-constructed shoe be resoled?
Often the outsole itself can be replaced, but the soft, unstructured upper limits how much rework the shoe can take overall compared to a welted shoe built around a rigid insole and lasting process.
What kind of shoes use Bologna construction?
Almost exclusively unlined or lightly lined summer footwear — soft loafers, driving shoes, and casual slip-ons where the entire selling point is a barefoot-like, unstructured fit rather than formal structure.
Sources & further reading:
BestLeather.org — Leather Shoe Construction Methods: https://bestleather.org/leather-shoe-construction-methods-goodyear-blake-blake-rapid-bologna-norwegian-adhesive/
