It is likely to belong to the oriental or woody fragrance family, given that “Obsession” is a well-known fragrance line from Calvin Klein with oriental and spicy notes.

Scent Profile: Again, without access to the specific notes used in this particular variant, I can provide a general idea of what you might expect in a Calvin Klein Obsession Night For Men fragrance. Typically, you can expect a complex and intriguing scent profile with a blend of various notes. This may include:

Top Notes: These are the initial scents you’ll notice upon application. They can include citrus, herbal, or fresh notes like bergamot, mandarin, or cardamom.
Heart Notes: These are the middle notes that emerge after the top notes have evaporated. They often include floral or spicy notes like lavender, nutmeg, or sage.
Base Notes: These are the foundation of the fragrance and become more pronounced as it dries down. Base notes can include woody, resinous, or musky notes like amber, cedarwood, or vanilla.