Cardboard, with processed aging. Due to the aging process, please be mindful of hygiene, such as wearing gloves. This is a homemade process using naturally derived aging materials. There is little actual dirt, the appearance of dirt is due to the aging effect. Taste: Cardboard (aged) for craft art! For art supplies, 3D art, etc. It's up to you! You can even frame it as is! (^_^) - Material: Cardboard - Shape: Rolled - Size: Approximately 60cm long and 30cm wide when unfolded. Thank you for looking.