Dip powder nails are somewhere between a regular mani and a fake acrylic nail. Instead of using UV rays to seal in your polish, the colour comes from a pigmented powder. Between base coats and a sealant, you dip your nails into a little jar of your chosen colour (SNS and Revel are the two most popular and vetted manufacturers) that could last three to four weeks.
The trend isn't exactly new but it's actually been around for years—but social media is quickly popularising the process and helping it stage a comeback. Over the past two years, more and more nail salons have started offering the service.