3D Mask Extender and Inner Support Frames If you've decided extenders are the way to go, consider the 3D Mask Extender and Inner Support Frames ($10 for a pack of 10) which is one of the cheapest options of this selection. Plus, they come with five cute pink extender belts, so it's a win-win for everyone. Image Source: amazon.com 3D Mask Extender and Inner Support Frames $10 from amazon.com Buy Now