Skip to main content

The Manual may earn a commission when you buy through links on our site.

Mack Weldon Partners with J. Crew to Bring Us All Prime Cotton Underwear

If you’re a regular reader of The Manual (we’re going to assume you are since you’re already here), you’re probably familiar with our near fanboy status when it comes to direct to consumer men’s essentials brand, Mack Weldon. From joggers, to underwear, to undershirts, to socks, to our favorite travel backpack, Mack Weldon’s clothing essentials are known for their luxurious and premium technical fabrics, simple, yet modern design aesthetic that often feature an athletic cut and totally relaxed vibe.

Recommended Videos

And now, for the brand’s latest foray into the world of brick-and-mortar retail (their first was also selling regular Mack Weldon products in J. Crew stores), Mack Weldon is launching their new Prime Cotton range of heritage-inspired underwear made exclusively for well-to-do, middle-class contemporary casual brand, J. Crew.

“As a growing company we look to partner with like-minded brands to further customer awareness,” said Michael Isaacman, co-founder of Mack Weldon. “J.Crew’s innovative men’s shops, coupled with their unique ability to curate third-party brands alongside their own product, made this an ideal match.”.

mack weldon j crew prime cotton collection
Image used with permission by copyright holder

The Prime Cotton line features a $24 trunk, a $28 boxer brief, and a $38 undershirt. All the pieces in the collection are made from premium, long-staple cotton that has been infused with an inner core of nylon, created to regulate body temperature. As body heat rises, the Prime Cotton product works to keep the body cool and, according to Mack Weldon, does not currently exist in any other cotton products today. This collection is great for guys who sleep hot and find themselves waking up sweaty more often than not. But you don’t have to be asleep to enjoy the cooling effects — the underwear will keep you chilled even just walking to and from work or lounging around the house.

“We wanted to take this idea of ribbed underwear that speaks to J. Crew’s heritage style, and update it with Mack Weldon technology,” said Matthew Congdon, Mack Weldon’s vice president of design, in a statement. The combination of Mack Weldon tech and J. Crew styling couldn’t work any better. The ribbed cotton along with buttons and a more traditional underwear fly offer up luxurious-looking style and total comfort.

All three Prime Cotton pieces are available today at J. Crew online and in select store locations.

Interested in finding even more underwear that’ll keep you looking and feeling cool all seasons long? We’ve got all the best options right here.

Chase McPeak
Former Former Digital Trends Contributor, The Manual
Chase McPeak is the former Lifestyle Editor. Chase regularly appeared on Beards, Booze, and Bacon: The Manual Podcast where…
FILA and J-FROST elevate a classic with the Original Tennis Lux
FILA and J-FROST reimagine the white sneaker with edge
fila x j-frost white sneaker

While FILA's history is full of iconic moments, the global fashion brand's current phase is still delivering the greats. In a collaboration with the visionary J-FROST, the duo has unveiled a revamped design for the classic Original Tennis Lux sneaker. A timeless and heritage sneaker, the Original Tennis Lux is an example of what the ultimate white sneaker should be. In this partnership, FILA’s heritage design combines with J-FROST’s signature clean aesthetic to create a statement shoe that speaks volumes with its contemporary and modern design. While the revamped sneaker delivers a crisp white base, its added details and features give it the perfect amount of edge to offer users a cutting-edge version of a timeless shoe every man should have in their wardrobe. 

J-FROST brings a street-style touch to FILA’s heritage white sneaker

Read more
TAG Heuer’s new Monaco Gulf is a racing legend reimagined
The Tag Heuer Monaco Gulf is a perfect tribute to racing history
The Monaco Chronograph Gulf

The iconic combination of the Heuer Monaco’s square case and the vibrant Gulf racing livery has achieved legendary status among serious watch collectors. Today, TAG Heuer and Gulf Oil return with the introduction of a captivating new iteration of the Monaco Chronograph Gulf, a luxury timepiece that masterfully celebrates tradition while embracing contemporary refinement. This is a watch designed to capture the rebellious spirit of 1970s motorsport while staying true to the technical performance and elegant finish expected by today's watch enthusiasts. It is a watch that speaks directly to purists, offering a unique insight into a bygone era of racing glory.

A dial that roars

Read more
Bulgari unveils stunning new bronze and green Octo Roma watch
Bulgari’s new bronze Octo Roma is a masterclass in material design
Bulgari Octo Roma watches

In an industry extremely competitive in the realm of luxury sports watches, Bulgari has consistently proven themselves capable of defying the conventional at every turn. The horological powerhouse has once again captivated both industry insiders and watch enthusiasts with an unexpected debut at Geneva Watch Days 2025: the introduction of a bronze-cased Octo Roma. This strategic move has Bulgari infusing its modern architectural aesthetic with a vintage-inspired patina that evolves with each wearer. This release is a profound statement from a brand confident enough to let its soulful narrative develop over time, further cementing the Octo’s status as an undeniable force in the industry. 

A patina meets Roman architecture

Read more