I wore the SRC shorts and they were worth every single cent! I have had PI/SPD with all three of my pg's but the shorts were only available when I was pg with my third. I credit them with keeping me walking... well, shuffling at least! You don't realise how much relief they give you until you take them off for a while and feel a huge increase in pain. I wore mine 23 hours a day, an hour off to wash and dry them!