Long tubes: The tubular structure operates in rows within the TriggerPoint GRID which acts like fingers to provide far more contact when rolling. Chafing is a thing all of us runners have problems with at 1 point or the opposite, and trust me it’s a huge nuisance! So this is https://ss82503.mywikiparty.com/1075796/the_2_minute_rule_for_trigger_point_roller