Mack Weldon makes men's basics and clothing: underwear, t-shirts, socks, tops, bottoms and accessories.
New customers who join the email list get 20% off a first order of $125+, on full-price items only. Codes don't combine with other promotions, and when two discounts compete, the site keeps the larger one.
Mack Weldon is a New York-based menswear label. Brian Berger, its founder and CEO, launched it after finding department-store underwear inconsistent in fit and quality, and its first product was the 18-Hour Jersey Boxer Brief. The range has since grown into tees, henleys, polos, button-ups, sweaters, jackets, chinos, sweats, shorts, swimwear, lounge and sleepwear, belts and bags.
Much of the line is built on named fabrics: SILVER, an anti-odor fabric used in tees and dress socks; AIRKNITx for light essentials; ACE French terry sweats; Tech Linen; and newer Vintage French Terry and Quilted Rib pieces. Underwear comes as boxer briefs, boxers, briefs, trunks and long johns, and shoppers can build their own packs of underwear, socks or apparel.
When shoppers look for Mack Weldon coupons
Mack Weldon coupon searches peak in December, about 2.1× a typical month, and dip lowest in July.
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US Google searches, Sep 2025 to Aug 2026. Search interest, not sales.
Does Mack Weldon offer free shipping?
Yes. Standard USPS shipping is free from $150 and $8 below it; Silver-tier members ship free over $100, Black-tier on every order.
How long does Mack Weldon shipping take?
Priority two-day FedEx is $10 and Expedited next-day FedEx is $30; most orders ship within 1-2 business days.
What is Mack Weldon's return policy?
Unworn, unwashed items can come back within 30 days through the returns portal; underwear needs its original packaging, and final-sale items stay sold.
Does Mack Weldon offer a military discount?
Yes. Military, teachers, first responders, healthcare workers and government employees get 15% off full-price items after verifying with GovX.
More about shopping at Mack Weldon
Return labels
You pay for the return label unless you added Checkout+ at checkout, which also covers lost or stolen packages.
Try On Guarantee
On a first order, one tried-on pair of underwear can be refunded or swapped for another size without sending it back.
Referrals
A friend gets $20 off a first order of $75+, and you get $20 in points.
Gift cards
Digital cards come in $50, $100, $150 and $200 and never expire.
Mack Weldon's code box is labeled "Gift Card or Discount Code" at checkout; type the code and click Apply.
On a phone, tap "Show Order Summary" first, or you won't see the field.
The 20% welcome code arrives after you sign up for marketing emails as a new customer.
It needs a first order of $125+ of full-price items.
Promo codes don't combine with other promotions, and if a discount is already on the order, the site keeps whichever is larger.
Rewards codes are limited to one per order.
The GovX code can't be combined with other offers either.
Where the code box sits on Shopify's standard checkout (illustration; screens vary).
If your Mack Weldon code doesn't work
Combining offers: Promo codes don't combine with other promotions; if a discount already applies, the site keeps the larger one. One rewards code per order.
New customers only: 20% off a first order of $125+ (new customers who sign up for marketing emails get the code; full-price items only) does not apply to repeat orders.
Where to enter it: Enter the code in the "Gift Card or Discount Code" field at checkout and click Apply; on mobile, open "Show Order Summary" to see the field.
Mack Weldon Rewards earns points on every dollar, with more at higher tiers, and they turn into discounts.
Points expire after a year without account activity, so a long gap between orders can wipe them.
Tier status also cuts shipping: Silver ships free over $100 and Black on every order.
Essentials bundles save up to 10%, and the sale section runs up to 65% off select styles.
Checkout+ costs extra, but it makes returns and exchanges free, which helps when you're unsure of a size.
Mack Weldon questions, answered
What is the Mack Weldon first-order discount?
New customers who sign up for marketing emails get 20% off a first order of $125+. It covers full-price items only.
Does Mack Weldon have a military or teacher discount?
Military members, teachers, first responders, healthcare workers and government employees get 15% off full-price items through GovX. It can't be combined with other offers.
Are Mack Weldon returns free?
Return labels are paid by the shopper unless Checkout+ coverage was bought at checkout. Items must be unworn and unwashed and sent within 30 days.
Can underwear from a first Mack Weldon order be returned after trying it on?
The Try On Guarantee lets one tried-on pair from a first order be refunded or exchanged for another size, and you keep the pair.
Do Mack Weldon rewards points expire?
Points expire after a year without account activity.
How much is Mack Weldon shipping under $150?
Standard USPS shipping costs $8 on orders under $150. Priority two-day FedEx is $10 and Expedited next-day is $30.