What to wear? Medical adjacent, casual-ish?

Help me pick branded clothing pieces!

I have an office job in a veterinary clinic. I occasionally have animal-care / client contact, but usually in a consultant role rather than hands on. I spend most of my time at my desk

Staff wears scrubs and branded casual tops. Branded hoodies are acceptable. Jeans are acceptable. Doctors wear branded polo shirts, branded lab jackets, khakis or jeans

I wear jeans (leggings now due a knee brace)

I'm not required to wear branded clothing

My office is COLD in summer and warm in winter

All branded clothing is gray. Wide range of pieces available.

What branded items would you pick to start a smart casual business wardrobe?