Hard Shell Chest and Soft Shell Back for Juniors. The new Hybrid range specifically designed for Moto features a hard shell chest protector to handle roost and a soft shell back protector for extra comfort. The 2.5 Hybrid Jr Chest Protector features a hard shell roost protector which is very lightweight and ventilated, while the back features soft 3DF impact foam that forms to the shape of your body making it very comfortable and ventilated. Total Leatt® protection score of 5 points. Roost protection in the front, soft 3DF impact protection in the back. 3DF AirFit ventilated soft impact foam: Back. CE tested and certified as impact protection: Back EN1621-2 Level 1. CE tested and certified as roost protection: Chest EN14021. 3D design ensures a comfortable, great fit. Padded base layer for the chest with soft 3DF foam back.