Terre d'Hermès Eau Très Fraîche was developed by perfumer Jean Claude Ellena, and is described as a dialogue between bitter orange and woody notes and a clash between the solidity of earth and the freedom of citrus.
Hermès Terre d'Hermès Eau Très Fraîche will be available in 125 ml Eau de Toilette. Look for it in March.
Update: "Seville orange is used in place of grapefruit which the original Terre d'Hermès uses, to give a fresher scent." (via fashionmonitor)
Another update: see a review of Terre d'Hermès Eau Très Fraîche.