tough membrane
- fibrousMade of threads
- leatheryResembling animal hide
- skinBody's outer layer
- hideConceal or pelt
- fasciaConnective tissue sheet
sinew · protective · resilient · chewy · thick · drum · eardrum · cell wall · sac · lining · gristle · tendon · rubbery · elastic · barrier · parchment · casing · sheath
durability/strength
tough membranethin membrane