Dip powder nails are considered as "diet acrylic", which are somewhere between a regular mani and a fake nail. Instead of using UV rays to seal in your polish, the color comes from a pigmented powder. Between base coats and a sealant, you dip your nails into a little jar of your chosen color (SNS and Revel are the two most popular and vetted manufacturers) for a mani that could last three to four weeks.
To apply, you first need to use a bond polish to the whole nail to make sure the color sticks, followed by a base coat to 3/4 of the nail. Next, dip your nail into a primer-like natural powder, then do another coat of the bond. After that, you dip your nail into the powder color of your choice and tap off the excess powder, then apply another coat of the base, and do another dip into the powder. Finally, brush on one last coat of the base and let your nails air dry.