What is a good outfit to wear in the fall to go to the zoo with a guy friend?

For the shirt I'd go with a light cotton, something you can feel snug. Pair it with a jean or thick jacket. As for bottoms jean joggers or loose fitting bottoms, something that still provides comfort but you can still look good in. Whatever you choose make it about mobility because zoos require mobility unless it's a drive in.

A shirt and shorts and a hoodie

Jeans and t shirt layered sweater

Good

Wear in what you'll be comfortable in

Cozy sweater + comfy pants + sturdy boots FALL ZOO PERFECTION! Warm, practical, cute and ready for all the walking, photos, and fun!

Depend on weather

It best to wear something comfy especially shoes

if it's outdoors i'd probably wear some breathable pants and also a breathable casual shirt! also bring sunscreen and a hat