Save up to 75% on Adidas sneakers and clothing — and 7 other sales and deals happening now

We rounded up the eight best sales and deals happening online today, with savings on Adidas sneakers and apparel on eBay, Tommy John underwear, Cole Haan shoes, and Helix mattresses. For even more deals and savings across the web, check out Business Insider Coupons.

The best sales and deals happening today at a glance

1. Save up to 75% on Adidas sneakers and apparel on eBay

Shop the Adidas sale on eBay now.

Adidas' website is probably the first place you'd look for sale items, but many of the brand's products are also available on eBay for less. By shopping at Adidas' official eBay store today, you can save up to 75% on sneakers and apparel. Even if you're not specifically in need of new gear, some of these deals are too good to pass up. For more deals and coupons on eBay, check out our coupons page.

2. Students and teachers save 20% sitewide at Tommy John

Shop the Tommy John sale now. 

Named the best overall pick in our men's underwear buying guide and women's underwear buying guide, Tommy John has been a huge hit among Insider Picks' reporters, editors, and many of our readers. The brand hardly ever has sales, but they're making an exception for teacher and students this back-to-school season. For a limited time, US K-12 teachers, college students, college faculty, and staff can save 20% on their order. To get the discount, simply enter your name, college/school name, and email address to verify your eligibility.

3. Save up to $700 on the Samsung Galaxy Note10 at Best Buy

Preorder the Samsung Galaxy Note10, Note10+ or Note10+ 5G at Best Buy now.

Samsung recently unveiled the new series of Galaxy Note10 phones. If you already plan to buy one of the new phones, Best Buy is running a great promotion on preorders. You can save up to $700 on the Note10, Note10+, or Note10+ 5G with activation and an eligible trade-in. Now through August 22, you'll also receive up to a $150 Samsung credit and six months of Spotify Premium. Visit Business Insider Coupons for more sales and deals at Best Buy.

4. Enroll in thousands of Udemy's online courses for $9.99 each

Enroll in $9.99 online courses at Udemy now.

With over 100,000 courses and 30 million students, Udemy is one of the best sites for finding useful online courses. Now through August 29, you can enroll in thousands of classes for $9.99 each. With courses on language, photography, music, personal finance, and interviewing, writing, and more, you can learn about anything you want.

5. Save 30% when you spend $150 at Ralph Lauren

Shop the Ralph Lauren sale now. 

Ralph Lauren is known for its iconic American-inspired designs  — and it's offering huge markdowns right now to end out the summer. Now through August 23, you can save 30% on orders of $150 or more by using the promo code "AUGUST" at checkout. With the discount, you can save up to 50%. In addition to apparel, footwear, and accessories for people of all ages, the sale also includes home goods. Visit Business Insider Coupons for more deals and savings at Ralph Lauren.

6. Save an extra 40% on sale styles at Cole Haan

Shop the Cole Haan sale now.

Now through August 28, you can save an extra 40% on sale styles by using the promo code "EXTRA40" at checkout. It's a great opportunity to pick up new dress shoes for the office, casual sneakers for the weekends, and even heels and sandals. Visit Business Insider Coupons for more sales and deals at Best Buy.

7. Save up to 85% on designer sunglasses at Nordstrom Rack

Shop men's sunglasses and women's sunglasses at Nordstrom Rack now.

Summer might be coming to an end, but that doesn't mean sunglasses are going out of style. If you're looking for a new pair of shades, Nordstrom Rack is definitely where you'll want to shop. Right now, you can save 25% on a big selection of designer shades. Since many of the products are already reduced in price, you'll save up to 85% on brand names like Dolce & Gabbana, Ray-Ban, Balenciaga, and Jimmy Choo. Visit Business Insider Coupons to potentially save more at Nordstrom Rack.

8. Save up to $200 and get two free pillows at Helix

Shop the Helix Sleep sale now.

While most mattress companies try their best to make mattresses that are comfortable for most people, Helix gets rid of the guesswork by designing mattress specifically for you. The brand uses a comfort and sleep quiz to accurately deliver on your preferences. In an early celebration of Labor Day, you can get $100 off and two free Dream Pillows with any mattress purchase by using the promo code "LD100," $150 off and two free Dream Pillows when you spend $1,250 or more by using " LD150," and $200 off and two free Dream Pillows when you spend $1,750 or more by using " LD200" at checkout. To learn more about the customization process, check out my review.