The sling for the Seitech dolly keeps the boat secure without putting unnecessary hull pressure. The sling is constructed of soft strong fabric the can withstand the elements. 62" length is compatible with Laser and Byte dollies.
The Seitech Sling is currently unavailable. See "Related Products" below for the substitute Sling in varying lengths from Dynamic Dollies, which will also fit your Seitech dolly.