High Quality - 3D embroidery you can see and feel Iron-On Backing - Strong glue and very easy to attach Perfect Size - Patch is 2.75” tall x 2.25” wide Stand out - Recognize your luggage at the airport conveyor belt Durable - These collectible patches are Machine Washable and ready to take a beating Creative Design - Our retro vintage designs let you stand out from the crowd of boring flag patches Versatile - Patches can be ironed onto a backpack, duffel bag, suitcase, jean jacket, hat… you name it Great Souvenirs - Perfect memento of your vacation or road trip Great Gift - Ideal for the traveler or person with wanderlust in your life Matching NPS Set - Check out all 63 National Parks in the series Mammoth Cave National Park is a spelunker's paradise. With over 400 miles of mapped passages, it's the world's longest known cave system. Travelers can explore the caves on their own or on guided tours. Above ground, the park offers hiking, camping, and horseback riding.