Designed to be worn every day, Warner’s This Is Not a Bra is made from a combination of nylon and spandex. It has full-coverage cups that lift and shape but don’t let you spill over, plus an underwire that’s encased in an extra layer of satin, so it won’t dig or poke into your skin. Reviewers say that “the bra line doesn’t show under T-shirts”—which means it can work for a variety of different tops, including silk blouses, thick sweaters, and button-ups. But because the cups are full coverage, it probably can’t be worn with lower-cut shirts like scoop necks or plunging V-necks. It’s available in 24 different colors and in sizes ranging from 34B to 38DD. Plus, the bra is easy to care for since it can be tossed into the washing machine without losing its shape. To buy: $15 (was $40); amazon.com. So many shoppers think the bra is comfortable that it’s gained 11,500 five-star ratings, and some even said that they’re replacing name-brand versions with this best-seller. “This bra is way more comfortable than a Victoria’s Secret bra and it’s half the price,” one customer said. “There is no digging or poking with the underwire and there is no bulging or gaping anywhere,” another five-star reviewer wrote. “I hate bras that make me feel fuller or make my shirts bulge out more. This bra is so soft and comfortable that I have actually slept in it a few times… I have tried Victoria’s Secret bras and Bali and just about every other brand, but they are not comfortable after a few times wearing them. This bra gets better as time goes on.” To buy: $15 (was $40); amazon.com. To buy: $15 (was $21); amazon.com.