The FutoFab adjustable lower control arms are available with an optional rubber boot to cover the inner pivot for an additional cost of $15/set. This boot will seal out grit, dirt and moisture that can greatly reduce the life of the joint. 

The inner pivot point on the FutoFab adjustable LCA uses high mis-alignment spacers. The inner radius is covered by the boot when installed while the outer shoulder remains exposed. This allows for full range of movement without compromising the boot's sealing capacity.

This close-up  image shows the rod end boot in place. The shoulder of the high mis-alignment spacer is not covered by the boot. The full range of the joint is not compromised by the boot.