The Hydro Firm post spray replenishes and hydrates the skin and includes skin firming ingredients. Its high vitamin content penetrates the skin’s outer layer boosting melanin development to enhance and maintain tanning results.  The upgrade cost for the Hydro Firm post spray is $5 and is applied by your SprayChic Expert directly after the tanning solution is applied. It can also be added on in our Auto Revolution Plus Spray Booth if you have opted for an automated spray tan.