Quick Strike isn't even a term that applies to anything about availability to the end customer (us). The availability is inferred because they are almost always limited. Retailers buy and sign contracts for these shoes about a year in advance of their release. Sometimes Nike, or whatever company, will come up with an idea after that timeframe and want to release it sooner than a year out. A quick strike is more a term for the type of the sale between Nike and the retailer. They are often times more limited because Nike has less time to make the shoes and distribute them, so they plan production accordingly. They are also more limited to the number of retailers than anything. Part of that is because Nike knows they will only make so many in the shorter time frame, so they only sign contracts with the few companies they need to move the number of pairs they'll have, and the company distributes them to their stores where they want to. These are a QS simply because they weren't in the 2013 look book and contracts were signed less than 12 months out from release date. I don't think 12 months is a hard date or anything, it just usually falls under that amount of time. These are a QS, but there are still kids pairs.