Here’s the thread where he sews in padding:
I don’t know the names of different foams. I cut up a pair of padded shorts that people use for snowboarding and mountain biking. A quick goog tells me it might be EVA foam. It’s just soft foam padding that’s like 1/4 inch thick.
If you have access to a Goodwill or Play It Again Sports, they might have something used that you can butcher and harvest.
Mine is not sexy looking, but it does the job. Last week, I dove to try to clear away a bad rebound (fail, goal against), and landed directly on my knee that historically gives me trouble. It didn’t bother me at all, and I didn’t even think about it, until this thread made me look back on if this padding is helping.
I wonder if d30 padding is light and fancy and SCIENCE, but ultimately not as good as just old fashioned soft foam.