An Amazon Prime membership brings you a world of benefits: free two-day shipping and same-day delivery options, instant access to movies on Amazon Prime Video, pharmacy discounts and Whole Foods delivery. You probably already knew that. But did you know that as a Prime member, you also have special access to secret sales? Yup, an Amazon Prime membership affords you entry into a hidden section of Amazon, a hub of "Just for Prime" sales that span categories. This special section is home to some of the best deals you're ever likely to see on Amazon or anywhere else. Check out our current favorite extended Memorial Day markdowns in Amazon's Prime-only secret sale section below.

Amazon

Kitsure Anti-Fatigue Kitchen Mat, Set of Two

$24$35Save $11

This cushy kitchen essential will keep your feet and legs comfy and supported during cooking marathons, while you're washing dishes and everything in between.

$24 at Amazon

"I bought these for the kitchen and they work perfectly," reported one satisfied customer. "They're really comfortable and the comfort lasts — they don't flatten out while standing to wash dishes or cook ... They are easy to clean and have held up well to everyday use. I would buy these again."

Amazon

Nicpow Outdoor Mini Projector

$60$100Save $40

Movie night just got a whole lot more fun, thanks to this mini projector that'll make you feel like you're in your very own theater. Its 240-inch projection literally allows you to watch your favorites on the "big screen."

$60 at Amazon

"I needed something that wouldn’t break the bank but had great picture quality, and this did not disappoint!" exclaimed a five-star reviewer. "The picture is crystal clear and the remote control makes it easy to use. Would definitely recommend if you are in the market for an outdoor projector!"

Amazon

Iongzon 4-in-1 Knife Sharpener with Cut-Resistant Gloves

$11$21Save $10

Why spend money on new knives when this affordable sharpener can transform your dull ones? Its four slots sharpen, repair and polish a variety of knives and kitchen shears, and it even includes a pair of cut-resistant gloves.

$11 at Amazon

"I had knives so dull, I had to push on them with a good amount of force just to cut peppers and onions," wrote one happy shopper. "Ten swipes through each slot, and they were cutting like new. Definitely would recommend this product."

Amazon

Oralfree Water Flosser

$30$40Save $10

Want to impress your dentist? This popular water flosser gently yet effectively cleans between your teeth for a fresher-feeling mouth. It comes with five replacement tips and four pressure modes, and it holds a charge for 15 days.

$30 at Amazon

"My dentist recommended that I start using a water dental flossing device," explained a verified customer. "I've been using it twice a day for around a month, and it's working out very well. I like that I can adjust the intensity of the water, since I have sensitive gums. It's easy to fill and I've never had any leaking issues. Best of all, it removes food particles I didn't know I'd missed, even after brushing, flossing and using a mouth rinse."

Amazon

VacLife Handheld Vacuum

$40$50Save $10

So long, fast food crumbs! This handheld vacuum effortlessly zaps up bits of dust and debris from the floor and seats of your car — or anywhere else — and it comes with brush and crevice attachments to target hair and small spaces.

$40 at Amazon

"I can't imagine a better vacuum cleaner than this one!" wrote a fan. "It's lightweight but the suction is very powerful. The brush head is perfect for cleaning the air vents, dashboard and seats. The long plastic tube can reach anywhere under the seats. I don't need to go to the car wash to vacuum my car anymore. So happy with my purchase. Highly recommended!"

Amazon

Finetoo Seamless Hipster Underwear, 6-Pack

$20$37Save $17

These top-selling undies get an A+ for comfort with their smooth, stretchy fabric and seamless construction. Plus, they're designed to stay put without slipping or riding up!

$20 at Amazon

One five-star fan called them the "Best panties yet!" adding, "[They're] so comfortable, do not ride up, stay in place, true to size. Just added two more six-packs to my order! These are my favorite panties now."

Amazon

OlarHike Travel Packing Cubes, Set of 6

$19$25Save $6

Save room (and headache!) the next time you travel with these space-saving packing cubes. They'll keep everything in your suitcase organized, and you'll be able to see what you stashed in them, thanks to their mesh panels.

$19 at Amazon

"Would buy again!" raved one Amazon customer. "Always was skeptical about packing cubes, but I wish I would have gotten some sooner. Great way to pack efficiently and stay organized throughout the trip. These have made it through a few trips and have done well."

Amazon

Drsaec Wireless Earbuds

$24$30Save $6

Listen to music, podcasts and audiobooks the way they were meant to be heard via these lightweight, noise-canceling earbuds. They can go up to eight hours on a single charge and easily pair with your phone via Bluetooth.

$24 at Amazon

"Good quality," said a satisfied shopper. "These earbuds came fully charged. They fit very similarly to the Apple AirPods. Surprisingly, the sound quality rivals that of the AirPods. I am glad I purchased these."

Amazon

Utopia Bedding 4-Piece Queen Bed Sheets Set

$16$22Save $6

This highly rated all-weather sheet set is meant to keep you cool in the summer and warm in the winter, and fans say its soft fabric will make bedtime feel like a dream. It includes a fitted sheet, flat sheet and two pillowcases.

$16 at Amazon

"This is the 5th or 6th set of this sheet I have bought for beds in my house. I love them so much," said one shopper. "Best quality for the price, perfect weight for any season, soft, durable. I have had multiple sets of the black sheets for different beds, and despite washing them in hot water, they never seem to fade."

Amazon

Ultrean 5.8-Quart Air Fryer

$60$100Save $40

This handy appliance lets you enjoy your favorite crispy foods with up to 85% less oil. It has 10 easy-breezy cooking presets and its compact design won't take up much space. That said, it can fit enough food for 3-5 people!

$60 at Amazon

"This air fryer is amazing," raved a happy customer. "It holds enough for my large family. It cooks so evenly and crisps up the food perfectly. I use this every day. I love the fact that I don't have to add oil. Very healthy alternative to pan frying. I highly recommend this product."

Not yet an Amazon Prime member? No problem. You can sign up for your free 30-day trial here. (And by the way, those without Prime still get free shipping on orders of $25 or more.)

Here’s everything you need to know about Memorial Day sales, plus all the best deals on the internet — kept fresh by our team of shopping editors. See all of our Memorial Day sales coverage across Yahoo, Engadget and In the Know, here.

The reviews quoted above reflect the most recent versions at the time of publication.

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