Made of quality 600D cordura material. Air ventilation zipper are fixed for summer season. 3 linings (1 fixed mesh breathable material, 1 detachable for waterproof and one thermal detachable lining). 5 pieces detachable CE approved molded protectors. Extra built in protectors at front and back of jacket for safety. Reflector strips printed on front, back and on sleeves. Available sizes are S for chest 38", M for chest 40", L for chest 42", XL for chest 44", XXL for chest 46", 3XL for chest 48" and 4XL for chest 50". PLEASE NOTE. The jacket sizes are slim fit. If you want a bit loose jacket fitting, better order one size bigger.