I started out using nothing but Pearl/Metallic balloons over 11 years ago and when you have thousands to do in a few days these will definitely give your hands a work out! But, the color is brilliant and the thickness helps them last even longer than the standard colors. I started out putting them in car dealerships and they'd stay up for a solid month, sometimes two and one time they even lated FIVE months! You can't go wrong with the pearl/metallic balloons especially if you're doing an outdoor display.