Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Speeds up breaking in a mitt

I bought this to help break in a Nokona Proline catchers mitt. From past experience I know that breaking in a Nokana is a labor of love and I wanted to form the best pocket possible. The last nokona glove I broke in by putting a ball in it and sleeping on it, catch, etc. For a mitt I wanted to be a bit more careful.On to the glove locker! I was concerned that it wouldn't wrap around a mitt, but I had no trouble getting it around the mitt. The material stretches nicely and there's plenty of velcro to hold it closed. The pocket for the ball in the glove locker is a nice touch - it would be nice if it was a little bit larger though. You really have to jam the ball in there.Overall very happy and I feel like it has cut weeks off of breaking in a new mitt.