outdoor shed door air leak

Hi there.
I have a couple outdoor sheds (made by Tuff Shed) that have some gaps around the doors that cause air leaks, and water leak if it is rainy and windy.
I've tried foam weatherstripping with some sucess. But I'd love to get a better seal if possible.
Any suggestions would be greatly appreciated.
Thank you.
Monica

Thanks anyway. I pieced several types and thicknesses together.
So we are good.

Thank you