Eternity Summer by Calvin Klein Cologne. A 2013 limited edition by Calvin Klein, Eternity Summer for men is part of the chic American label's popular Eternity fragrance line. In this unique contemporary formula, notes of seaweed, driftwood and tarragon spice combine to yield a captivating, aqueous composition. As bracing as sea spray, Eternity Summer revives your grooming routine, no matter the season. Discover how Calvin Klein captures the essence of waves crashing on the shore when you open a bottle of Eternity Summer.