Materials EN 1078 Clause 4.1 Construction EN 1078 Clause 4.2 Durability EN 1078 Clause 4.5 Chinstrap EN 1078 Clause 4.6.2 Closing device EN 1078 Clause 4.6.3 Colour EN 1078 Clause 4.6.4 pH EN ISO 3071 Inspection and determination of mass EN 1078 Clause 5.2 Pre-conditioning high Tª + 50ºC EN 1078 Clause 5.4.2.1 Low temperature conditioning -20ºC EN 1078 Clause 5.4.2.2 Artificial aging EN 1078 Clause 5.4.2.3 shock absorption capacity EN 1078 Clause 5.4 Resistance and ease of opening of the retention system EN 1078 Clause 5.5 Retention system effectiveness EN 1078 Clause 5.6 Vision field EN 1078 Clause 5.7