D3O might be the problem
By Andrew Ranked #918 - Accessories January 19, 2010
I got my wife a pair and we ended up returning them because she said that they gave her no tailbone protection at all. According to the d3o website, this material can withstand impact from a hammer on a watermelon. But for some reason it still hurts when you fall on your tailbone.
The main purpose of impact shorts is for tailbone protection and these fail at that.
Helpful Votes: 0 Yes