1.Material: HDPE or ABS
2.Wheel ratchet with four or six point fix plastic harness
3.Any color is available
4.Comfortable to wear for long time
5.Harness size: 53-63 cm 6.Locking systems:Rachet,buckle or press type
7.Excellent impact resistance that will not fall off rapidly at lower temperature. 8.Large temperature range from -20°C to 80°C. 9. Certificate :CE EN397 10.Standard:ANSI/ISEA Z89.1-2009
