Gomon Custom Clothing · Style Guide

Different Types of Suit Jackets, Explained

Short answer: Beyond single- vs. double-breasted, a suit jacket’s real character comes from three construction choices most guys never ask about: canvassing (what holds the chest’s shape — full canvas, half canvas, or fused), vents (the slits at the back hem — single, double, or none), and pocket style (patch, flap, or jetted). Together these decide how the jacket drapes, moves, and ages, independent of color or fabric.

Canvassing: What Actually Holds the Jacket’s Shape

Inside every suit jacket’s chest and lapel is a layer of interfacing called canvas, named after the material traditionally used for it. According to Wikipedia’s overview of suit construction, there are two broad approaches to attaching it:

Construction	What It Is	Tradeoff
Full canvas	Floating canvas runs the full front of the jacket, stitched (not glued) to the outer fabric	Most durable and drapes closest to the body over time; highest cost and more hand labor
Half canvas	Floating canvas in the chest and lapel, fused interlining in the lower front	A middle ground on cost and drape — common on mid-to-upper range suits
Fused	Interlining glued directly to the outer fabric instead of floating	Lowest cost and lightest; Wikipedia notes it “is less soft and, if poorly done, damages the suppleness and durability of the jacket,” including a risk of puckering after cleaning

None of these three is “wrong” — a fused jacket is a reasonable choice for an occasional-wear suit, while full canvas earns its price on a jacket you’ll wear for years. The honest way to think about it: canvassing is a durability and drape decision, not a formality one.

Vents: The Slits at the Back Hem

Vents are the vertical slits cut into the back hem of a jacket, and they exist for a practical reason — Wikipedia notes they improve how the jacket hangs and moves, “particularly when using a pocket or sitting down.” There are three standard options:

• Single vent. One slit at the center back. Originally a sporting detail, now the most common vent style overall.
• Double vent. One slit on each side. Described as “typically British” in origin, and generally considered the more formal, dressier option — it also tends to sit more smoothly with your hands in your pockets.
• Ventless. No slit at all, associated with Italian tailoring for a cleaner, closer silhouette. Dinner jackets and tuxedos traditionally skip vents entirely for the same reason.

If you’re deciding between a suit and a tuxedo for a formal event in the first place, our Suit vs. Tuxedo vs. Blazer guide covers that distinction in more depth.

Pocket Styles: Patch, Flap, and Jetted

Pocket style is one of the clearest formality signals on a jacket, and the three main types run from most casual to most formal:

Pocket Style	What It Looks Like	Formality
Patch pocket	Fabric sewn flat onto the outside of the jacket, visible stitching	Most casual — Wikipedia describes it as “a sporting option, sometimes seen on summer linen suits”
Flap pocket	Pocket set into the jacket, covered by a matching fabric flap	Standard for everyday business suits — the default on most side pockets
Jetted pocket	A clean slit finished with a strip of fabric taping, no flap or visible pocket bag	Most formal — most common on tuxedos and formalwear

Fit and Silhouette: Slim, Classic, and Tailored

Separate from construction, the jacket’s silhouette comes down to how close it sits to the body:

• Slim fit. A closer cut through the chest and waist with a shorter jacket length. Reads modern, but less forgiving if your build changes or you prefer more room to move.
• Classic fit. A fuller cut through the chest and waist with more room throughout. Comfortable and forgiving, but can look boxy if sized too generously.
• Tailored fit. A middle ground — shaped at the waist without the slim fit’s tightness. This is where made-to-measure has a real advantage, since the jacket is built around your own proportions instead of a generic size curve.

Suit Jacket vs. Blazer vs. Sport Coat

A suit jacket is cut from the same fabric as its matching trousers and is meant to be worn as a set. A blazer and a sport coat are both built to be worn on their own, in a fabric that doesn’t match any trousers — the difference between those two comes down to styling details like buttons and pockets, which our What Is a Blazer? guide covers in full if you’re trying to tell them apart.

Choosing These Details with Gomon

On a made-to-measure order, construction details like canvassing, vent style, and pocket style aren’t locked in by whatever’s in stock — Gomon lets you choose them as part of building your jacket around your own submitted measurements. Standard production runs about 20 days, with a two-week expedited option available, and if a fit adjustment is needed once it arrives, we start with alterations before anything else.

FAQ

References

• Wikipedia — Suit (clothing) — construction details on canvassing, vents, and pocket styles.

Content prepared for Gomon (customclothinghere.com). Internal links to specific product/collection pages, and to the companion “Suit vs. Tuxedo vs. Blazer,” “What Is a Blazer?”, and “Types of Suits Explained” articles, to be added by the Gomon team before publishing.