Calvin Klein CK One Summer Eau de Toilette Spray, 3.4 oz $54.00 Bright. Energetic. Fresh. CK One Summer captures the electric energy and free spirit of a desert ritual. The threads of red-gold saffron set the festivities ablaze, while the lime, citron and cucumber create a feeling of the crisp air with an icy zing of freshness against the fiery heat of the desert.