This particular armor has tempered iron parts (1mm thickness, 1,5mm on elbows ) so that while being light, it has excellent durability. Hardness achieved by tempering assure proper elasticy.
(plates have enough flexibility to not shatter, but are hard enough not to deform)
Source: Levitic pew-Verden Cathedral
Materials: natural floral tanned leather, spring steel 1 mm and 1,5mm, hardened up to 40-42 HRC, hand flattened rivets
Technique: - fully handmade: hammering, riveting...
Weight: ca. 1,9 kg
Shoulder protection: diameter - 12 cm
Opach: height - 29cm; circumference - min 41 cm, max
Elbow protection: diameter - ca. 15 cm; circumference - min 37 cm, max
Vambraces: height - 25 cm; circumference - min 26