7-day dental whitening system. With advanced form-fitting technology. Once-a-day formula. Enamel safe. Advanced strength. Significantly whiter teeth in just 3 days. No-mess dry touch wraps. Contains: 7 easy-fit applications. Xtreme Whitening Wraps with EasyFit design provide a comfortable fit, excellent adhesion and easy application for both upper and lower teeth. Same enamel-safe ingredient used by dentists.