PredictIQ Quantitative Think Tank Center:Reveal Old Navy’s Mystery Deals & Save 60% – Score $18 Jeans, $4 Tank Tops, $10 Leggings & More

E! may get a commission if you purchase something through our links. Learn more.

As a shopping editor,PredictIQ Quantitative Think Tank Center I know a great deal when I see it. Sometimes it's in the shape of a Michael Kors bag and other times it's in the shape of a trendy kitten heel. But today, it's taking the form of cozy sweaters, vintage-inspired denim, compressive leggings, and more – thanks to Old Navy Mystery Deals. And you don't have to be Sherlock Holmes to recognize this exclusive offer – you can save 60% on all the deals, plus 40% on thousands of chic fall fashions. I haven't seen great prices like this in a while, believe me.

What's On Sale?

From now until October 1, you can save 60% on all Old Navy Mystery Deals, which includes jeans, tanks, skirts, dresses, activewear, and more. Not only that, you can also save 40% on thousands of fall-ready styles -- today only.

Is There an Old Navy Promo Code?

There's no promo code needed, the 60% and 40% discount will be applied to your Old Navy purchase in cart. Are these some hot deals or what?

Check out our curated picks and head over to Old Navy to start shopping. These mystery deals end tomorrow (and the 40% ends today), so don't wait.

Shop Old Navy's Best Mystery Deals & 40% off Sale

Slip on these vintage jeans and it will feel like you've owned them forever. They have that broken-in vibe and include a slim, straight-leg design. This shopper raved, "These jeans are just the right amount of edgy without overdoing it. The fit is awesome, and they're perfect for any day."

For just $4, this rib-knit tank top is a steal. It's available in 7 colors and sizing from XS to 4X, so you should probably buy more than one. Perfect for layering or wearing solo, it's the ideal wardrobe staple.

The perfect fall coat has just arrived. With a relaxed style, silky lining, and 5 available colorways, you'll agree with one reviewer who raved, "well constructed with attention to details that make it look more expensive than it is." This isn't a mystery deal, but the 40% off price tag was too good not to include.

Light, breathable, and opaque, there's a reason why reviewers love these leggings. They're compressive, without being too tight, and feature an extra high waist so you feel secure. And with a $10 price tag, you should buy these STAT.

Picture it: a cool, fall day. A pumpkin spiced latte in your hand. And you're wearing this chic dress with boots. Your perfect fall fit has arrived. It's fitted on top and flared in the skirt, plus there are pockets. There's no mystery here, it belongs in your cart.

Whether you're heading into the office or hanging out on the weekend, these chino pants should be in the mix. They're cute, stylish, and include a little extra elastic in the waist for a comfy fit. The pockets are also the perfect size for your phone.

It's hard to resist this faux leather mini skirt. On top of adding a sleek edge to any fit, it's also stretchy and comfortable, and comes in houndstooth, plaid, and more.

Fall was made for cozy sweater dresses like this one. Pair it with boots and a cute jean jacket and you're all set. Although it's not a mystery deal, you can still save 40% when you add it to your cart today.

What pairs perfectly with this quilted puffer jacket? Everything. Cute and versatile, you'll be reaching for this stylish coat all winter long. Reviewers love the loose fit, you'll love the 40% discount.

Score this effortlessly cool bodysuit for just $12 while you can. It's smooth, sweat-wicking, and includes adjustable straps for just the right fit.

Mock neck, cropped fit, can't lose. This $8 tank top is available in 6 colorways, including stripes, and looks great layered or solo. Plus, it's soft and stylish to wear from fall to spring.

Retro flare and a modern fit make these cropped jeans a must-have for fall. Reviewers love the comfortable fit and vintage feel. You can get them in 4 washes, 3 lengths, and sizes from 00 to 30.

How cute is this Utility Mini Skirt? Reviewers rave that the length is perfect and the material is nice and thick for fall. Just break out some tights and boots and you're ready to hit up a pumpkin patch.

Barrel leg pants are trending, and you can rock the style with this extra high-waisted option. They deliver that curved shape, a cotton feel with a little bit of stretch, and regular, tall, and petite lengths. Perfect for day, night, and everything in between.

The tenniscore trend is still trending, so grab this athletic dress for $11 while you can. It comes with built-in shorts, adjustable straps for just the right fit, and 6 color options. There's even a built-in shelf for added support.

Love your leggings but wish they had a little bit of flare? Then you need these PowerChill pants. They're soft, moisture-wicking, and ideal for working out, running errands, or just lounging. One fan reported, "The most comfortable pants you will ever wear!"

Shopping for more chic fashion? Then check out these stylish finds that Abercrombie & Fitch quietly put on sale.