100% Chardonnay. 75% 2016 & 25% reserve wines. Les Roises is a 0.62-hectare monopole in Collin's home village of Congy in the northern Coteaux du Morin. The 65-year-old vines have full southern exposure and are planted on soft clay and silex topsoils over limestone. As for all Collin Champagnes, the fruit is hand-harvested, the clusters destemmed and the grapes gently pressed; the juice is fermented spontaneously and slowly (up to six months) with natural yeasts in mainly-used Burgundy barrels; reserve wines are held in foudres and tonneaux. The wine is bottled without fining or filtering and aged sur lattes for an extended period, 4 years in the case of Les Roises. The wine is disgorged and finished with a dosage of 1-2 grams/liter at most.