I think that I once read a thread about this, and now I'm having the same problem. My DD keeps crying if we ever put her in her TF for long periods of time(1 hour+). Because the seat is a spare in DH's truck, the only time we ever use it is for long drives. She always says that her bum hurts, her bum hurts. When I take her out of the seat, he entire butt is bright red. I assume this is due to a lack of padding and all the weight being directly concentrated right on one spot. Is there any way to fix this? I feel so bad everytime because I know it must really hurt if her whole butt shows the marks.