CLAIM The entrapped water in the powder mixes with polymers to create major height. EXPERT OPINION "It delivers exactly what it promises: big hair with texture," says N.Y.C. hairstylist Tommy Buckett. The moisture released from the water molecules activates the polymers so you get more volume than you would from others styling powders, says Englewood, N.J., cosmetic chemist Ni'Kita Wilson. OUR VERDICT A tiny bit tacky, but it did revive a deflated blowout. Massaged into roots, it gave our strands sexy, tousled effect, P.S.: It' steal at $6!