bundswehr

dear all, I just bought a 1993 YJ. The car is in good condition. But due to the poor insulation it is very hot to drive right now in the summer and laut if the speed is above 80km. I want to ask what is your experience with Jeep Wrangler? Is my jeep too old or it is general problem with Jeep Wrangler. And is there any solution to improve the insulation? Thanks.