The ICON Knee Field Armor 3 features a bio-foam and air mesh chassis paired with D30 knee and leg impact protectors. Elastic hook and loop straps give you a snug fit over many leg sizes. The low profile design allows them fit under most motorcycle pants. D30 knee and leg inserts Dual adjustment straps Low profile design Fits under most motorcycle pants Meets or exceeds 1621-1 2012 Class C Level 1