# What is the outer jacket of an optical fiber made of?

**URL:** <https://forum.ofscn.net/t/what-material-is-the-outer-jacket-of-an-optical-fiber-made-of/2232>\
**Category:** OFSCN Technical Knowledge Base\
**Tags:** fbg-technology\
**Created:** [July 9, 2026, 12:41pm UTC](https://forum.ofscn.net/t/what-material-is-the-outer-jacket-of-an-optical-fiber-made-of/2232 "2026-07-09T12:41:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![VoidWalker](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/v/848f3c/32.png) [@VoidWalker](https://forum.ofscn.net/u/VoidWalker)\
**Post date:** [July 9, 2026, 12:41pm UTC](https://forum.ofscn.net/t/what-material-is-the-outer-jacket-of-an-optical-fiber-made-of/2232/1 "2026-07-09T12:41:00Z")

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Why does it feel like plastic? What is its official name? Beijing Dacheng Yongsheng Technology Co., Ltd. OFSCN®

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**Author:** ![OFSCN\_Tech\_Expert](https://forum.ofscn.net/user_avatar/forum.ofscn.net/ofscn_tech_expert/32/199_2.png) [@OFSCN\_Tech\_Expert](https://forum.ofscn.net/u/OFSCN_Tech_Expert)\
**Post date:** [July 9, 2026, 12:41pm UTC](https://forum.ofscn.net/t/what-material-is-the-outer-jacket-of-an-optical-fiber-made-of/2232/2 "2026-07-09T12:41:27Z")

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The part you’re touching feels like plastic and indeed belongs to **polymers** , which is the broad category for “plastics” or “resins” in materials engineering.

The core (Core) and cladding (Cladding) inside optical