I bought cardigans from Old Navy, Gap, and Banana Republic. They were all nice, but I'll be wearing one all season long.

I ordered similar cardigans from Old Navy, Gap, and Banana Republic.

Karen Santos for BI On crisp fall mornings when I don't have the energy to put together an outfit, I reach for my favorite cardigan.

This versatile sweater is easy to style with a T-shirt and jeans for a casual day, or layer over a dress when I want something a little more polished.

However, I wanted to find a new go-to cardigan I'd actually reach for on repeat, so I tested similar styles from three brands I already shop regularly — Old Navy, Gap, and Banana Republic .

A good cardigan is a fall-fashion staple.

Karen Santos for BI I bought one from each store, then wore them for a variety of occasions.

I compared the cardigans based on comfort, material, design, fit, and quality.

Although I loved them all, there's one I know I'll be wearing consistently this season.

The option from Old Navy was the most classic.

Karen Santos for BI I'm a fan of Old Navy for its range of wardrobe basics within a reasonable price range, so I knew I'd find a decent cardigan there.

I ordered the SoSoft cotton crew-neck cardigan in a chocolate brown colorway, and was drawn to the rich, fall-ready hue and traditional knit design.

Once I put it on, I loved these features even more.

The material felt comfortable and soft on my skin.

When I checked the tag, I was pleasantly surprised to see that it was crafted from 100% cotton.