The case counts with tabs to secure ids or hotel keys indicated in the image as red  arrow

You can also add the optional clip to secure documents, this part is pressfitted but it needs a little bit of glue. is represented by the blue arrow

I recommend using a .2 mm layer height , i've try with PLA and PETG and it works fine. Consider slowing down bridges speed  the design is print in place

🛡 Rugged Passport Case – Protect Your Travel Document

Keep your passport safe from drops, moisture, and travel wear with this sturdy, 3D‑printed protector:

• ✅ Impact-resistant shell with reinforced corner ribs
• ✅ Passport fits snugly—secure but easy to remove
• ✅ Optional belt-clip / carabiner loop for carry versatility
• ✅ Printed in PETG or ABS for rugged durability
• ✅ Fits standard passports from most countries

🖨 Print Settings

• Printer: Tested on Bambu P1S/X1C and Prusa i3
• Material: PETG or ABS recommended; PLA OK for light-duty use
• Infill: 25–40% for rigidity
• Supports: None
• Bed Adhesion: Use brim to prevent warping if needed

Check out my other desings