Features • Prepared for chest compartment with removable D3O chest • Shoulder & elbow & back protection upgradeable to D3O level 2 viper pro • Fully breathable & lightweight Technologies AVS-Richa air ventilation/circulation system through closable air vent zippers, mesh penels, .. . D3O- From Moto GP to on-road & off-road, D3O delivers a wide range of level 1 & 2 protection. D3O offers the number one choice for impact protection delivering comfort, flexibility & fit. 3M Thinsulate insulation is warm yet lightweight, powerful yet thin. It helps trap body heat while allowing moisture to escape. Knox