One of my favorite items for layering are button down shirts. The plaid & flannel options are great in the winter and chambray denim button downs are great in the summer. I often like to wear them tied around my waist (seen here) but I've found that worn this way for concealed carry isn't the greatest method. When I do wear them as intended I always wear them half-tucked, as it makes the shirt feel less stuffy. The key is to wear your concealed firearm on the side where the shirt is untucked. This will allow for an easier draw and it also helps minimize any printing.
Disclaimer: The information provided here is based on my opinions and for informational use only. I am not an expert in this field and any items/services/products/advice mentioned in these posts should be used at your own discretion, in accordance with your local & state laws, and you should follow applicable manufacturer’s instructions. You can read more about my privacy & disclosure policies here.