Bilt Evolution Jacket The Bilt Evolution Jacket is the simple solution to the motorcycle jacket question. Its 600D shell is abrasion resistant and holds up to regular wear and tear. CE rated armor covers the shoulders and elbows. Complete the impact protection by installing a CE rated back protector (sold separately). A removable quilted liner provides insulation, while multiple zippered vents provide air flow. Construction: 6000D Textile shell Mesh interior lining Removable quilted jacket liner Ventilation: Zippered vents on the chest, back and biceps Mesh lining Protection & Safety: Vented Axial AX1 CE Level 1 shoulder and elbow armor Pocket for optional Axial back protector (sold separately) Size MD Axial AX1 and AX2 back protectors fit all sizes Evolution Jackets Reinforced shoulders and elbows Reflective details Comfort: Sleeve adjustment system Comfort rolled collar Waist adjusters with hook & loop closures Zippered closure cuffs Pockets: Zippered front pockets Multiple zippered interior storage pockets Inner cell phone pocket Other Features: Jacket-to-pant short connection zipper