Mason's men’s summer jackets: the light elegance of iconic fabrics for Spring/Summer 2025

When temperatures climb, the classic spring jacket can feel bulky or too sporty. The men’s summer jackets by Mason’s instead work almost like an accessory: as light as a shirt, yet enriched with sartorial details that soften the formality of the look and make it instantly more contemporary.

The military DNA of the line—from the Field Jacket M74 in stretch Pima-cotton twill Mason's to the new City Field in cotton-tencel blend Mason's—comes together with materials designed for Mediterranean heat: thermoregulating hemp, linen-cotton and stretch pima-cotton. Thus models like the Flyshirt and the Williams Overshirt become the perfect bridge between business-casual and leisure, elevating chinos Milano, Torino or Bermuda shorts Chile without sacrificing a tailor-made touch.

In the following sections we will explore the most sought-after casual styles of 2025, learn how to tell blazers and jackets apart with examples from the collection, identify criteria for choosing the right fit, fabrics and winning combinations, and answer the most frequent questions. Get ready to discover how a Mason’s jacket transforms the warm season by combining functionality and refinement in barely more space than a shirt.

Casual Men’s Summer Jackets

Anyone looking for casual men’s summer jackets today expects the same effortlessness that carries them from a seaside brunch to a work call: the secret is the fabric. Cotton twill remains unbeatable because it combines a cool handfeel, high durability and a natural “wrinkle-resistant” attitude—qualities that minimize creasing even after hours of travel. On this technical base is grafted the character of Mason’s: the Field Jacket M74, crafted in stretch Pima-cotton, weighs only a few grams more than a shirt but offers an adjustable internal drawcord, four cargo pockets and the unmistakable “M” rivet Mason's.

Those seeking an even lighter approach can opt for the James Overshirt in cotton chevron: the herringbone weave ensures stability without adding bulk, while the slim silhouette flatters lean frames. It’s no coincidence that overshirts rank among the most requested men’s pieces of 2025, as they allow playful layering without fearing the summer heat. Simply pair a white tee with tailored denim to transform the overshirt into a lightweight men’s summer jacket—perfect from aperitivo to domestic flights.

• Wrinkle-resistant twill = less crease stress
• Field Jacket M74: internal drawcord, “M” rivet
• James Overshirt: cotton chevron, slim fit
• Ideal with white leather sneakers or suede desert boots

Which jackets are in fashion?

The S/S 2025 runways decree a return to dusty hues: from pastels—soft pink, light yellow, pistachio green—to navy blue, which remains the season’s new black. Within this chromatic mood, two jacket styles dominate street-style: the overshirt and the field jacket, both reinterpreted in fluid cuts and breathable fabrics. Fashion insiders hail the overshirt as a “key piece” in the 2025 men’s wardrobe for its versatility from business-casual to weekend escapes.

Mason’s embraces the trend with the Flyshirt in a cotton-hemp blend: the vegetable fiber enhances breathability and offers natural antibacterial properties—perfect for scorching temperatures—while the yellow hue mirrors the S/S 25 palette. For a bolder statement, choose the Work Field Jacket M74 in lime green: the vibrant shade echoes Mediterranean nature and energizes monochrome looks in beige or sand.

• Pastel palette + timeless navy
• Overshirt: 2025 all-rounder
• Flyshirt in hemp: breathable & antibacterial
• Lime-green Field Jacket M74 = instant eye-catcher

What is the difference between a blazer and a jacket?

The blazer originated on Victorian yacht club docks: lightweight structure, metallic buttons, solid formal color; the jacket (or sport coat) descends from three-piece suits and retains more structured shoulders and internal canvases. In practice, while the blazer is meant to be “separated,” the jacket remains the upper part of a coordinated suit.

Mason’s reinterprets this distinction with the M74 Work Jacket, which blends field-jacket functionality—drawcord, roomy pockets—with a clean, deconstructed blazer cut: a perfect hybrid for those who want double-breasted formality with sportswear agility. At the other end, the Flyshirt in hemp plays the “shirt-jacket” card, becoming the casual alternative for light-packing trips without sacrificing style. In this way, Mason’s covers the full spectrum: from the business-travel blazer to the lightweight coastal aperitif jacket.

• Blazer: metallic buttons, separate look
• Jacket: upper part of a suit
• M74 Work Jacket: casual meeting without tie
• Flyshirt: relaxed “light” travel alternative

Featured Mason’s Products

Field Jacket M74	96% Pima-cotton twill + 4% elastane; 4 pockets, drawcord, “M” rivet	Dark green, navy, dark beige, white	Military heritage reinterpreted, weight < 400 g
Flyshirt	71% cotton, 29% hemp; patch pockets, buttons	Yellow, green	Natural breathability, no ironing needed
James Overshirt	Cotton chevron, flaps, adjustable cuffs	Sky blue, brick red	Herringbone = visual depth

Selection & Styling Guide

Body & Fit

• Broad shoulders → Field Jacket M74 (drawcord cinches the waist).

• Lean build → James Overshirt, slim fit.

• Shorter stature → Flyshirt.

Occasion

• Business-casual? Flyshirt with Milano chinos.

• Weekend away? Green Field Jacket + cargo Chile.

• Rooftop party? James Overshirt over a striped polo.

Seasonality & Fabrics

• April–June: lightweight twill.

• July–August: hemp or linen.

• Early September: cotton-tencel twill of the City Field.

FAQ

How do I measure for a jacket?
Lay one of your jackets flat, measure shoulders and chest, then compare with the Mason’s size chart.

What do you wear under a jacket in summer?
Mason’s jackets are designed as the final lightweight layer. If it gets breezy, opt for the more structured Field Jacket M74 (100% cotton, Oxford canvas) or the City Field in cotton-tencel twill, which is slightly more substantial.

Which jackets in the SS25 collection are the warmest?

• Field Jacket M74 Canvas (100% cotton, dense canvas)

• City Field (62% cotton / 35% tencel / 3% elastane)

• Williams Overshirt in tech satin travel-stretch, ideal for light evening insulation

What fabrics are used for Mason’s summer jackets?
Stretch Pima-cotton twill (Field Jacket M74), Oxford canvas (M74 Canvas), cotton-tencel (City Field), tech satin travel-stretch (Williams Overshirt), hemp (Flyshirt) and cotton chevron (James Overshirt). All selected for freshness, breathability and wrinkle resistance.

How do you wear camouflage without overdoing it?
Choose a single camo piece—e.g. the Field Jacket M74 Camouflage—and pair it with neutral chinos and minimalist sneakers: the pattern remains the focal point while the rest of the outfit stays understated.

The Essence of the Summer Jacket According to Mason’s

The men’s summer jackets by Mason’s encapsulate Italian artisanal tradition in contemporary forms: noble fabrics, iconic military details, fits studied down to the millimeter. Whether you choose the technical lightness of the Field Jacket M74, the natural breathability of the Flyshirt or the urban versatility of the James Overshirt, each piece elevates your summer outfit with the nonchalance that defines Italian style. Discover the full collection on the website and prepare to enjoy the warm season with comfort, personality and that exclusive touch only Mason’s can offer.