According to the brewery webpage "La Trappe Isid’or is a lightly sweet amber beer with a hint of caramel. The beer tastes softly bitter and has a fruity aftertaste. La Trappe Isid’or is brewed with the self-cultivated Perle hop." The beer is named after the first friar-brewer at the abbey, Isidorus Laaber. His initial brewing abilities is part of the reason we can continue to enjoy La Trappe beers today.
This is also, so far, my favorite La Trappe offering.