They're CE Spiders. (If memory serves, there was only one run.)

Gotta disagree with Hawkgammon. While the CE Spiders do feel somewhat like Champion Spiders (IMO, Champion are tackier), they are more stable and much more durable. I've had a CE Spider in my bag since they first came out, and after hundreds of rounds, it still flies like it did when it was new. (I can say that with confidence because I have 9 other CE Spiders that have only been thrown on a practice field to compare it to.) YMMV.