4 Confidence Boosters. Buy 3, Get 1 FREE. Just $63. Meet the Frost + Fire Confidence Booster Bundle — four of our most-loved colors in one easy, wear-on-repeat set: Dark Green, White, Burgundy, and Black. Over 70,000 Confidence Boosters sold! These are the smoothing, stretchy layering tanks our customers come back for again and again. WHY YO