Not sure if there's a thread on this....just sharing my experience. First off, I have a titanium rotary cutter. Did not intend to buy one, discovered when I got home that it required titanium blades. But I LOVE this cutter. I always use the green mats for cutting fabrics. Last week I got a great deal (60% off) on a cutting mat/ironing board thing...not sure what it's called.... The mat on it is blue.....let me tell you, the blue mats do NOT allow you to cut good. It's NOT the blade. It kept skipping sections as if the blade had a ding in it. I got out my green mat and the blade cuts just fine, thank you. SO.....if anyone asks, green mat...always buy a green mat!!!!!!!