Platonic Solids design for architect, teacher, mathematician, computer scientist and all who love math, physics, sacred geometry, symmetry, crystals, mathematical formulas, geometric symbols, Pi Day, signs, Euler, Euclid, Pythagoras, Platon, Schläfli. Cool gift idea for men, women, girlfriend, boyfriend, student, professor, birthday, Christmas, travel, nerd, geek, gamer, leisure, school, university, special occasions. Tetrahedron, cube, hexahedron, octahedron, pentagon dodecahedron, icosahedron. Lightweight, Classic fit, Double-needle sleeve and bottom hem