Product manual:
Chest Protector Flapper This is a high-manganese steel material, installed in the stab-resistant clothing inside !! You can buy two, using one in the chest, in the use of a back!

Chest Protector Flapper for Stab-resistant clothing
Buy Link https://www.amazon.com/dp/B01M0SCR9R

Specifications
Level 3 Protection: thickness 2.3 mm, weight 1.5 kg
Level 5 protection: thickness 4.5 mm, weight 2.45 kg

Mode of transport
Using an efficient international air express transportation

• Internal Material: high manganese steel. External material: shock-absorbing EVA + waterproof nylon
• Level 3 Protection 2.3mm weight 1.5 kg. Level 5 protection 4.5mm weight 2.45 kg
• Chest Protector Flapper, installed in the stab-resistant clothing inside!
• Buy Stab-Resistant Clothing Search: B01M0SCR9R