The Mariner Zip Knit in white striped cotton, full front zip, relaxed fit
The Mariner Zip Knit

$110.00

Add to cart This product has multiple variants. The options may be chosen on the product page

The Mariner Zip Knit

$110.00

Montelaire

Size guide

Body measurements in inches. Our cuts are true to US sizing.

SizeUSBustWaistHips
XS0-232-3325-2635-36
S4-634-3527-2837-38
M8-1036-3729-3039-40
L12-1438-4031-3341-43
XL1641-4334-3644-46

Between sizes? Choose the larger size for a relaxed fit, the smaller one for a closer fit. Measure over light clothing, tape snug but not tight.

Still unsure? Email [email protected] with your usual size and we will advise you. 30-day returns on every order.

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A cotton zip knit that sits between a sweater and a shirt. Worn open over a linen shirt on cool mornings, or zipped close when the temperature drops. The Mariner works because it doesn’t try to be everything.


  • Ships worldwide in 5-7 days

  • 30-day returns, no questions

  • Durable cotton, built to last

The Mariner began as a response to a simple problem. A knit that could transition from morning to evening without looking like you’d tried too hard. Cotton breathes where wool can feel heavy in spring; the weight sits right between a t-shirt and a full sweater. The stripe and solid colorways were chosen to pair with almost everything already in a wardrobe. No statement. No logo. Just a piece that works.

The construction uses a medium-weight cotton jersey, finished with a clean-cut collar and a two-way front zip. The sleeves taper slightly at the cuff without pinching. The length sits at hip, which means it works untucked over a shirt or under a blazer. We’ve sourced the cotton from mills in Portugal that have been spinning the same weight for thirty years. The dye lots are consistent. The shrinkage is minimal if you follow the care instructions.

Why a cotton zip knit earns its place in a considered wardrobe



Layering that actually works

Worn open, it adds texture without bulk. The weight is light enough to fit under a blazer, structured enough to stand alone on a cool day.



Proportions that fit most frames

The length and sleeve taper were designed to work on both slighter and broader builds. No tailoring required for most wearers.



Cotton that softens with wear

The fabric relaxes slightly after the first wash, becoming softer without losing shape. It improves over time, not the reverse.

Cotton zip knit specifications and materials

Dimensions Length 27 inches (68 cm) from shoulder seam. Chest width 20 inches (51 cm) at size Small, scaled proportionally in larger sizes.
Weight 600 grams (approx.) for size Small. Increases by 40-50 grams per size up.
Material 100% cotton jersey, medium weight. Sourced from Portuguese mills, combed and mercerized for durability and softness.
Finishes White Striped, Navy Striped, Black Striped, Solid Black, Solid Gray, Solid White. All colorways use reactive dyes for color fastness.
Origin Yarn sourced from Portugal. Knit and finished in Portugal. Cut and assembled in Portugal. No offshore production.
In the box One Mariner Zip Knit. Packaged in tissue paper and a kraft box. No plastic. Includes a single care card.

How to care for and wear your cotton zip knit


  • First wash. Wash in cold water with mild detergent. The knit may shrink 2-3% in length and width. Lay flat to dry. Do not tumble dry.

  • Avoid direct sun. Hang to dry away from direct sunlight. UV exposure will fade the dyes over time, especially the darker colorways.

  • Routine washing. Wash every 5-7 wears, or when visibly soiled. Cold water, gentle cycle, mild detergent. Turn inside out to reduce pilling.

  • Pilling. Light pilling may occur in high-friction areas (underarms, sides). Use a fabric comb or depiller to remove. This does not indicate poor quality.

  • Storage. Fold and store flat or on a shelf. Do not hang for extended periods, as the weight may cause the shoulders to stretch slightly.

Who chooses the Mariner zip knit for their everyday rotation

The Mariner works for people who have already built a wardrobe and are looking to fill a specific gap. You own a navy blazer, a few oxford shirts, some chinos. You want something that layers without adding bulk, that can be worn alone on a cool day, and that doesn’t require thought. It’s not for someone seeking a statement piece or a bold color. It’s not ideal if you prefer heavier knits or if you live in a climate where temperatures rarely dip below 60 degrees Fahrenheit. But if you value simplicity and proportion, and if you’re willing to care for cotton properly, the Mariner becomes a piece you reach for constantly.

Buying a cotton zip knit: common questions answered

What size should I choose?
The Mariner is cut with a relaxed fit through the chest and shoulders. If you typically wear a Small in t-shirts, try a Small here. If you’re between sizes, size up. The length is consistent across all sizes at 27 inches from the shoulder seam. Check the chest width measurement in the specifications table to confirm fit.
How long does shipping take?
Orders ship within 5-7 business days from our warehouse in the United States. International orders typically arrive within 10-14 days. You’ll receive a tracking number via email once your order ships. We use USPS, UPS, or DHL depending on destination.
Will the Mariner shrink after washing?
Yes, expect 2-3% shrinkage in length and width after the first cold wash. This is normal for cotton jersey. Subsequent washes will not cause additional shrinkage if you follow the care instructions (cold water, lay flat to dry). The fabric will soften with each wash.
How does the Mariner compare to the Striped Half-Zip Knit Sweater?
The Mariner is heavier (600g vs 480g), has a full front zip instead of a half-zip, and is cut slightly longer. The Half-Zip is better for layering under jackets; the Mariner works as a standalone piece. Both are 100% cotton. Choose the Mariner if you want versatility between worn open and zipped closed.


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The Mariner Zip Knit in white striped cotton, full front zip, relaxed fit
The Mariner Zip Knit

$110.00

Add to cart This product has multiple variants. The options may be chosen on the product page