Based on Levi's jeans, comfort-fit and relaxed-fit are almost the same, both sit at the waist, have slightly tapered legs and are made from 100% cotton. Comfort-fit is basically loose fitting jeans, while relaxed-fit has more room in the seat and thigh, specifically.
According to eBay, relaxed-fit jeans are a type of denim trouser that is made from cotton twill. A pair of relaxed-fit jeans are characterized by a fit that retains its shape in the seat but is slightly looser in the thigh and hip area.
Womens’ relaxed-fit jeans are also referred to as "boyfriend jeans," mainly because it is a female style that resembles a male cut. It also has wider leg space starting from the thigh to the hem, which is great for those who do not like jeans that are cut too tight or too loose.
Check out tips on finding the right jeans for you from Real Men Real Style.
Get advice and tips with a guide on how to wash, break in and fold jeans, shared by Style Caster.