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Hey, HuffPost readers! Welcome back to What's The Big Deal?, a HuffPost Shopping newsletter devoted to surfacing the day's very best sales on just about everything, from comfortable footwear and skin care essentials to the practical stuff you need to make your life better. This week, we're eyeing price cuts on a worth-every penny robot vacuum and a French retinol that HuffPost readers can't stop buying.

It's Finally Time To Snag That Robot Vacuum You've Been Eyeing (While It's This Cheap)

Shark attacks are a major concern this time of year, but a Shark robot vacuum attacking the dust and dirt on your floor is a life-saver we could all use. For a limited time, you can score 50% off this best-selling unit and let the AI handle your floor cleaning needs.   $299.99 at Amazon

Don't Miss These Deals:

HuffPost readers adore this hidden-gem French retinol cream and it's currently less than $16. Bedding company Casper is running a sale on their entire cooling collection. Mattresses, bedding and pillows designed to bring relief to hot sleepers are up to 35% off. Power outages are not uncommon during extreme heat waves. Invest in one of Jackery's highly-recommended portable power stations while they're temporarily 47% off.

The Best Portable AC Units That Don't Go In Your Window

If you don't have central A/C or an available window, a portable unit is the way to go. Our shopping editor did all of the research to find you the best-reviewed options on the market.

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Over 17,500 Amazon reviewers love this ice roller for reducing puffiness or just cooling you down. Check it out, along with seven other summer products recommended by people who run hot. Upgrade your at-home fitness routine by incorporating these adjustable ankle weights — or find additional equipment to improve your at-home workouts. Sometimes there's just no avoiding sweating through your clothes when temps reach a certain point. That's where this multi-pack of moisture-wicking undershirts will come in hand — or shop other T-shirts worth buying in bulk.