Damn you guys and your expensive knee pads. The 7 dollar a pair volley ball knee pads at walmart have way way more padding then any paintball ones and they dont slip down if you get the right size. You can agressivly knee slide on bare concrete with them and not feel it thanks to the ~1.5 inches of padding. I mean they're designed for aggressive knee slides on on hard wood floor. You can easily kneel on big rocks and roots without even noticing that they're there. Mine are starting to stretch out going into their 3rd year and frankly they're cheap enough that it wouldnt bother me to have to replace them every year.