I'd like to suggest a different approach to deal with this situation.
Have you ever considered using natural remedies to protect your avid gardener from bees? It's a method I personally use for my hiking gear with Deet, and it might work well for the garden clothing too. Simply spray it on your clothing while it's hanging outside on a line, let it dry, and then apply some more before heading outdoors. Natural remedies are often less toxic than Deet's solution, so it's worth exploring.
Link: htt**://www.greenmatters.com/p/natural-bee-repellents
On a related note, has anyone tried using ThermaCell or a similar portable option in the garden to ward off bees? It could be a convenient solution they could take with them while working outdoors.
I hope these suggestions are helpful.