Martial arts such as Judo, Brazilian Jiu Jitsu, Submission Wrestling, Ninjitsu, Ju Jitsu and Aikido can demand a lot of time spent on your knees and for those not used to it can cause a lot of discomfort.
Lightwight and comfortable to wear under gi pants, completly washable by hand.
Available in a four sizes - these tend to run one size up
Color is black only.