What is the heaviest cotton flannel you have heard of?

[phillyforager]

Hey everyone,

I am in the market for an incredibly heavy cotton flannel.

I have owned the iron heart UHF, and absolutely love them. But I was wondering if any other companies make anything heavier than the UHF.

Any help is appreciated.

Thanks

[grantr2]

UES makes an extra heavy weight flannel at 15.5oz

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[Giles]

Anny Ultra Heavy Flannel will be 14oz

[browniemcghee]

I am sure that the IHSH-11 is far thicker than any other UHF I have ever seen.  I would guess that it is over 16oz.

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[endo]

@Giles:

Well, it ain't a UHF….it's heavier....

my heaviest is the IHSH-305-BLK

[jordanscollected]

@phillyforager I had a conversation in the not too distant past with Mike @Filthy who owns a crazy heavy RRL flannel shirt. He said it's like twice as heavy feeling as a UHF, but I don't know the specifics like if there is stacked fabrics or what.

[Filthy2123ozjunkie]

My RRL shirt is cashmere and lambs wool not cotton 

[phillyforager]

bump, wondering if there is anything else out there!

Thank you all for the suggestions thus far

[popvulture]

There was an RMC flannel a couple years ago that was very very heavy, under their 8 Hour Union brand, I believe. Lemme see if I can find it — don't think it's currently in production, though.

[popvulture]

This is the one… can't find the fabric weight, though.

https://www.realmccoys.co.jp/catalog/products/detail.php?product_id=4237&pg=