I assume you're talking about soft top. If so, It won't hurt anything but your wallet. Its like pulling a little parachute around...but it won't hurt the Jeep.
"If you don't have parts left over, you did something wrong."
"Owning a JEEP makes heroin addiction look like a vague wish for something salty."
"A liberal is someone who feels a great debt to his fellow man ....which debt he proposes to pay off with your money."