15% Knix Coupon Code for August 2025

You can score 15% off sitewide with our exclusive Knix promo code. Simply click the coupon above to reveal your discount code. Whether you're refreshing your top drawer with leakproof underwear, trying the viral Revolution Bra, or stocking up on comfy basics, this discount code applies to just about everything. It's an easy way to save on the pieces everyone’s been talking about.

Once you add everything you want to your cart, head to checkout. Enter your Knix discount code in the box that says "Discount code or gift card." Just hit "Apply" to see your new subtotal. Knix will also show you your total savings at the bottom of the page.

Whether you're refreshing your top drawer or trying something new, we think these Knix favorites are worth a spot in your cart—and yes, your discount code works on all of them.

Sign up for Knix emails or texts and you’ll get a coupon for 10% off your first order. By signing up, you’ll also be the first to know about sales, promos, and deals on their cult-favorite bras, super-soft undies, and everything else worth adding to your top drawer.

Share the love (and the comfort). Share your referral link with a friend, and they’ll get $20 off their first Knix order. Once they check out, you’ll get a $20 Knix coupon code to use on your next purchase. It’s a win-win.

Knix offers free standard shipping (four to eight days) on orders of $100 or more. If you want it faster, you can upgrade to expedited shipping (three to six days) for $4.99. Orders under $100 ship for $5.99 with standard delivery or $9.99 with expedited.

The Knix student discount gives you 16% off full-price purchases when you verify your student status through Student Beans. It can’t be combined with other offers, but it’s still a great way to save on your go-to basics.

If you're a fan of Knix, Club Knix is definitely worth signing up for. It’s free, and you’ll get access to points, rewards, and members-only perks. 

You’ll earn one point for every $1 you spend. Rack up 200 points and you can redeem them for $10 off your next order. You can also trade in your points for rewards from the Knix Rewards Shop. Options include the Lingerie Wash Bag for 50 points, Knix Active Cap for 100, Light Leakproof Bikini for 150, and the Quintessential Sleep Set for 1,000.

As a member, you’ll also get early access to new drops and a birthday surprise delivered to your door.

We love a good Knix coupon code, but you don’t always need one to save. The brand regularly runs deals on bestsellers, bundles, and curated kits, so you can stock up and save all year long.

Get 15% Off the Sculpt Ruched One-Piece Swimsuit

Knix’s best-selling ruched one-piece is 15% off and ready to upgrade your swim drawer. The tighter-knit UPF 50+ fabric smooths and sculpts for a flattering fit, and the removable straps let you switch up the style. One suit, multiple ways to wear it.

Bundle and Save on Knix Underwear

Found a fit you love? Mix and match your favorite styles, colors and absorbency levels, and get automatic savings at checkout.

Here’s the breakdown of what’s available:

—Light and Essential: 3 for $60 (regularly $22 to $29 each)

—Moderate and Heavy: 3 for $75 (regularly $25 to $36 each)

—Ultra and Overnight: 3 for $99 (regularly $36 to $48 each)

Get 20% off Underwear Kits

Knix’s curated underwear kits make it easy to build your top drawer in one go, and they’re all priced 20% below regular retail. Each kit comes with a mix of cuts, colors, and absorbency levels, depending on your needs.

Here’s what you can shop:

—Heavy Flow Kit – Bikini: From $131.20 (save $32)

—Heavy Flow Kit – High Rise: From $153.60 (save $38)

—Leakproof Cotton Kit – Bikini: From $80 (save $20)

—24/7 Leakproof Kit – High Rise: From $128 (save $32)

—24/7 Leakproof Kit – Bikini: From $120 (save $30)

—Full Cycle Kit – High Rise: From $141.60 (save $35)

—Full Cycle Kit – Bikini: From $124.80 (save $31)

—Everyday Comfort Kit: From $123.20 (save $30)

Save 15% When You Buy Three or More Thigh Saver Shorts

The internet-famous anti-chafe shorts everyone’s been talking about are 15% off when you grab three or more. The deal applies to both the Essential and Leakproof Thigh Saver styles, so you can stock up and keep things smooth all summer.

Get a 10% Knix Discount When You Mix and Match Sets

Create your own set with a Knix best-selling bra and your favorite underwear silhouettes. Start by adding a bra in your preferred color and size, then add as many bottoms as you like. You’ll need at least one bottom to qualify for the 10% off set offer, but it definitely pays to add more.

Save up to $45 With Teen Kits

Knix’s teen kits include four to eight leakproof bottoms and are designed for everything from first periods to heavy flow days. Each kit comes with a curated mix of bikini and boyshort styles and includes savings of up to $45.

Knix doesn’t hold back when it comes to savings. Along with year-round markdowns and bundle deals, the brand also runs several major sales throughout the year.

The biggest one is the Knix Anniversary Sale in April. Last year, shoppers saw 30% off all leakproof styles and 25% off bestsellers like the Revolution Bra.

More recently, Knix launched its Warehouse Sale with 30 to 50% off almost everything. That included seamless bras, leakproof underwear, and swim essentials. The Good to Go Seamless Bra dropped to $25 from $48, and the Leakproof Ultrathin French Cut Mystery 3-Pack was marked down to $40.40 from $81. 

Knix also goes big for Black Friday with sitewide discounts up to 60%. Last year’s sale lasted through Cyber Monday, but it’s best to shop early before top styles sell out.