If you live in a hot climate like me or leave your plane in the sun you have experienced putting on seat belts with extremely hot buckles. I found a solution using a spring type windshield sun screen. This type coils up when not being used, it's light weight and fits behind the seat. It covers both seats from the panel to behind the seats. Cost on Amazon was (2) for $15.99.
https://www.amazon.com/dp/B00KC7NQ0M/ref=cm_sw_r_sms_c_api_i_ucX5EbYYZA26D
https://www.amazon.com/dp/B00KC7NQ0M/ref=cm_sw_r_sms_c_api_i_ucX5EbYYZA26D