Silicone and rubber straps are non-metal materials and fall under 911390, which covers watch straps, bands, and bracelets of materials other than precious metal or base metal. This subheading also captures leather, textile, and synthetic straps.

Yes — straps made from skins of species listed under CITES (such as certain crocodilians or lizards) require CITES permits and may also need USFWS documentation at the port of entry. Importers should verify the species and its CITES appendix status before shipment to avoid detention or seizure.