Nothing special just some cheap ones from amazon https://www.amazon.com/gp/product/B07MV7T5GZ/ Alu-cab sells a rain kit for this very reason but this was an easy thing to throw together myself. and I prefer a taut-line hitch knot over one-inch webbing with bucklesThanks Lumis. Seems like these clamps have worked well for you. Can you please tell me the brand. I did some looking but there are so many different clamps out there and not sure of the quality? Yours are proven.