16 Comfy but Stylish New Costco Clothing Deals Worth Adding to Your Cart in September

As the seasons change, members flock to Costco's clothing section to hunt for new arrivals or stock up on staple pieces for a capsule wardrobe that can carry them through the year.

Costco clothing is stylish, comfortable, functional, and best of all, affordable. From cozy sweaters and denim jackets to everyday basics like tees and pajamas, their selection is curated to appeal to a wide range of tastes. It's one of the easiest ways to unlock the true value of your membership while refreshing your wardrobe.

Whether you're looking to refresh your seasonal wardrobe or find reliable everyday essentials, we've rounded up 16 must-have Costco clothing deals worth adding to your cart this September.

Editor's note: Prices and availability are subject to change and may vary by location.

Price: $16.99

The Briggs Women's Button-Front Waffle Shirt combines comfort, warmth, and style at an unbeatable price. Made with waffle-textured fabric, ribbed cuffs, and two front patch pockets, it's designed for effortless wear.

One happy customer said, "It is cute, comfortable, casual, and oh so easy to toss on! It would look cute with jeans or leggings, whatever you choose to wear. It's one of those shirts that you buy brand spanking new, and it looks like an old favorite friend in your closet."

Price: $18.99

A well-designed lounge suit can elevate your relaxation experience. Whether you're relaxing at home or heading out for a quick run, Danskin Women's lounge suits are a popular option.

This half-zip top, priced at $18.99, is crafted from 82% rayon, 13% polyester, and 5% spandex, offering a soft and breathable feel. It features a half-zip front and raglan sleeves and is available in black or brown.

Price: $15.99

If you purchase the Danskin Women's Luxe Half-Zip Top, these pants are a perfect match. They are constructed of the same rayon, polyester, and spandex blend as the top and are sold in the same colors. For added comfort, these lounge pants include seam pockets and an elastic waistband.

They're sold in multiple sizes, with plus sizes available online.

Price: $16.99

Keep your feet cozy this fall with these slippers. Designed with an on-off silhouette, they're versatile enough to wear both indoors and outdoors. As one customer exclaimed, "I can't believe these are $17. It's a popular brand and it's usually priced so much higher."

Despite their popularity, these polyester slippers are still available at Costco in gray or brown for just $16.99.

Price: $19.99

If you're searching for a comfortable and stylish pajama set to wear on vacation or while lounging at home, the Flora Nikrooz Women's 3-Piece Pajama Set is a great choice. This set includes a V-neck tank top, relaxed-fit pants, and a robe in a lovely floral pattern. Lightweight and cozy, it's currently priced at $19.99.

Price: $21.99

Costco's new Dalia Women's Sweater Dress is the perfect blend of style and comfort for fall, offering warmth without added bulk. This knee-length dress features a relaxed fit, ribbed neckline, and long sleeves, making it a versatile choice for both casual outings and dressier occasions. Available in beige or black, it comes in sizes X-Small through XX-Large.

Price: $19.99

Elevate your everyday wardrobe with Banana Republic Women's Ponte Pant, available at Costco for $19.99 in black, brown, and green. These pants feature a high-rise waistband, a straight leg silhouette, and pintuck detailing on the front legs, adding a touch of class to their relaxed fit. Pair them with a button-up, tee, or sweater for stylish, all-day comfort.

Price: $21.99

The Modern Ambition 5-Pocket Pant combines comfort and function with a flexible waistband and five convenient pockets for your wallet, keys, or phone. The stretch fabric, along with fabric belt loops and a zipper coin pocket, adds to its everyday practicality.

Costco shopper Dave raves, "These are super comfortable, don't get overly wrinkled, and the numerous length options means you can find your size without needing tailoring. I'd give these 10 out of 10 for the price!"

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Price: $15.99

Fall calls for cozy layers, and Mondetta's ribbed pullover sweater at Costco delivers. Priced at $15.99 and made from recycled nylon and spandex, this item is both lightweight and warm.

Features like thumb holes, a zip pocket, and a throat protector help block chilly winds, making it perfect for brisk autumn days. Right now, it's available in black, blue, and purple, and shoppers love it. One raved, "…loved it so much I bought the other two colors."

Price: $17.99

Stay cozy this fall with the Buffalo Women's long-sleeve fleece pullover. Designed with a V-neck, ribbed hem and cuffs, and a relaxed fit, this new arrival is ideal for keeping out chilly winds and drafts. Priced at $17.99 and available in tan, green, or pink, this versatile choice offers everyday comfort.

Price: $17.99

When it comes to comfort, Jaclyn's Women's Halloween pajamas are second to none. Shopper J9CT shared, "These pjs just arrived, and I am delighted with them! They are truly so soft (a #1 consideration for me with pajamas). Living in the Northeast, I won't need the shorts for Halloween, but they're so nice I'll no doubt use them before then."

This three-piece set is made from a soft polyester/spandex blend, featuring a Halloween-themed design on a purple or gray background. It includes pants with an elastic waistband, a pair of comfortable shorts, and a short-sleeved button-down shirt.

Price: $21.99

The Kirkland Signature Men's Knit Shirt offers comfort and versatility with its casual button-up design and handsome spread collar. Crafted from a special wrinkle-resistant, 4-way stretch fabric featuring a grid or mini square pattern, this long-sleeve shirt can be dressed up with a tie and cuff links for work or styled with jeans for a swanky, casual look.

Price: $21.99

The Frye Women's Patterned Cardigan delivers cozy warmth and elevated style for the season. Crafted from luxe yarn, it features a bold jacquard pattern, long sleeves, and an open-front design for easy layering. Functional patch pockets and a straight hem add convenience, while black and dark red color options make it a versatile statement piece.

Price: $21.99

Just in time for fall, Costco is stocking the Boston Traders Women's Faux Suede Trucker Jacket. This versatile piece includes dual patch pockets, a full snap closure, and faux shearling bonding for warmth. Details like snap sleeve cuffs, two interior flannel patch pockets, and flannel plaid back neck tape make it a standout, especially at $21.99.

Price: $13.99

Costco offers more than just outerwear and sleepwear — they also have high-quality undergarments at great prices. This September, Carole Hochman's Women's Seamless Briefs are available for $13.99 for a five-pack. Made from stretchy, soft fabric and available in black and tan, these briefs are designed for a secure, comfortable fit all day.

Price: $37.99

"Most of the time I read reviews before making a purchase, and I'm glad I did this time," said one shopper about the Adidas Women's XPLR Path 2.0 Sneakers. "These shoes are so comfortable, well supportive...[offer] plenty of room at the toe, no pinching, and my feet feel embraced."

If you want your feet to feel the embrace, Costco is offering them in sizes 6 through 10 for $37.99 this month. Each pair features a breathable mesh upper, a lace closure, and is available in both black and purple.

As you can see, Costco offers a wide variety of clothing and accessories for men and women. They also carry apparel for children and even pets, making it easy to find gifts for the holiday season.

Are you taking advantage of Costco's exclusive deals? Be sure to check their website before shopping in-store to find online-only offers that can save you even more — and don't forget to pair your purchases with one of the best cash back credit cards to maximize your savings.