u/Haunting-Ad-9263

I realised I don’t actually understand what “canvas” means in handbags.

I always thought canvas was a specific material, but apparently it can be cotton, linen, polyester, coated, uncoated, etc. Yet brands often just say “coated canvas” without explaining further.

Canvas itself seems more like a construction/fabric category than an actual material.

So when brands say things like “coated canvas,” what is it usually made of in practice?
And why don’t brands disclose the underlying material more clearly?

An example from Celine (what is "triomphe canvas"?):

• DETAILS 12.2 X 7.9 X 6.7 IN (31 X 20 X 17 CM)
• TRIOMPHE CANVAS, TRIMMINGS IN CALFSKIN
• TEXTILE LINING
• GOLD FINISHING
• HAND CARRY, SHOULDER CARRY AND CROSS-BODY CARRY
• DOUBLE ZIPPED CLOSURE
• ONE MAIN COMPARTMENT 
• ONE INNER ZIPPED POCKET
• LEATHER HANDLES WITH 4.72 IN (12 CM) DROP 
• KEY HOLDER
• REMOVABLE AND ADJUSTABLE STRAP WITH A MINIMUM
• DROP 17 IN (44 CM) AND MAXIMUM DROP 20 IN (50 CM)
• REFERENCE : 119572CAS.04LU