Even though my Rhino Hide is still very young, it's leaves are quite thick and tough. Your Thunderbolt is gorgeous.

I agree, your Thunderbolt is gorgeous!

I also have Rhino Hide. Dream Queen boasts thick leaves as well in my garden. If I find adequate ones, photos to follow... in the meantime, I'll refer to Don Rawson's list to see what else I may have. ;-)

my Blue Angel has thick (and huge) leaves..

Elegans wins in my garden, slugs ignore it.

From Don's list I have:

Rhino Hide (Don's very own)

BME (Blue Mouse Ears)

GSME (Giantland Sunny Mouse Ears)

Liberty

TOC (Touch of Class)

Remember Me

Revolution

In my garden, I would also add these as having thick leaves:

Krossa Regal

June and her family (incl. English Sunrise)

Devon Green

Dream Queen

Rainforest Sunrise

Big Daddy

Have to add at least one quick photo...

Rhino Hide :) when it was new

Dream Queen

mountainy man..also deer resistant!

Think the name must be rusty shovel

Another one - Rainbow's End.

I just bought it last summer, and have it in a pot... even though it's young, I'd say the leaves seem thick. Almost rubbery.

Definitely agree, Windymess!

Mountainyman--that cracked me up. It is even flowering!

Dick Ward ain't too bad in the substance department.

What is the cultivars name? You should email to Don R for his list of Deer-Resistant Hosta.