Free shipping thresholds.
Each brand's threshold will be visible when you shop on that site. Once you add an item to your cart, the free shipping threshold will show on the bottom of your screen. As you shop, the value will decrease until you have met the threshold. Once the threshold is met, the bar disappears letting you know its not needed anymore.
The brand's primary color identifies the dollar value it represents (pictured below). Once you are in the shopping cart, it will show you a summary of the brands on the order (pictured right).