Many soft tops now have an option for tinted rear windows. Bestop offers a 31% tint on the rear windows of many of their soft tops. Please note that with the tint option, door windows are NOT tinted.

JK Unlimited Replay
Wrangler Unlimited JK Replay
with Tinted Windows
JK Unlimited Sailcloth
Wrangler Unlimited JK Sailcloth Replace-a-top
with Tinted Windows