Shield and solar panel: what they have in common

1. Step 1. Shield — is made of — Leather. Leather on a wooden base.
2. Step 2. Leather — is material for — Helmet. Helmet liners and simple helmets were made of leather.
3. Step 3. Helmet — is made of — Kevlar. Modern ones are aramid.
4. Step 4. Kevlar — is material for — International Space Station. The micrometeoroid shielding is Kevlar and Nextel.
5. Step 5. International Space Station — has part — Solar panel. Solar panels.

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