text:  In the winter, they keep shit hot. In the summer, they keep shit cold. TVRINC.net. Are you not able to be outside and enjoy the summer weather as much as you want because of joint pain? Right now is a great time to be outdoors, but not if your knees, shoulders, back, or hips are causing you pain. Hey, it's Mike Casper here for QC Kinetics, reminding you that you don't have to suffer any longer.