Reserved for a circle of insiders since 1838, Maison Mumm’s exceptional champagnes epitomize the excellence of its terroir and savoir-faire.
True to this heritage, RSRV represents the only collection of five 100% Grand Cru cuvées. RSRV Cuvée 4.5 is a champagne appreciated for its elegance and harmonious complexity.

This champagne is a tribute to Maison Mumm’s Grand Cru terroirs. Harmony and complexity.