1- Open Google Chrome.
2- Add a product to cart: http://www.projectgreenbag.com/reusablebags/groceries/
3- Click view cart, or click checkout.
4 - Below the navigation, the page is completely white. The rest of the page is missing. Users cannot make a purchase because the rest of the page doesn't load.
5 - Hover over the navigation, when the menu opens you can see it's cut off for some reason.