Soyuz and zip: what they have in common

Step 1. Soyuz — has part — Parachute. Landing by parachute.
Step 2. Parachute — is made of — Nylon. Modern canopies are sewn from nylon.
Step 3. Nylon — is material for — Backpack. Nylon.
Step 4. Backpack — has part — Zip. Zips.