These triangular acrylic sign holders have a closed bottom that prohibits any moisture from damaging the materials inside the exhibit. The 3 sides allow for customers to view information from different angles. These triangular acrylic sign holders are the perfect way to display different materials while only using minimal table space. The clear plastic is lightweight and makes transporting the promotional items from table to table hassle free. These triangular acrylic holders are easy to take care of and clean.