Because-safety-is-our-number-one-concern-we-offer-the-ergonomic-GRAVITY-Level-2-back-protector-The-GRAVITY-covers-the-spinal-area-from-waist-to-neck-flexing-with-the-body-to-provide-optimal-protection-for-street-track-&-off-road-riding-To-optimize-the-back-protectors-comfort-the-GRAVITY-has-air-channels-for-ventilation-&-adjustable-shoulder-straps-that-hold-it-gently-in-place-PROTECTION-FEATURES-Outer-shell-microcellulare-PU-foam-3D-air-mesh-Protection-EVA-foam-pr EN-1621-2-level-2-ERGONOMIC-FEATURES-Fit-comfortable-anatomic-pre-shaping-Adjustability-double-adjustment-tab-Ventilation-ventilation-panel-Features-airchannels