Given the task definition and input, reply with output. In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.

The gloves on first appearance were good. However, after a few hours of riding they left a bunch of black material on my hands. I wiped that off and when I went to wash my hands, I noticed they were stained black. I would not recommend this product.
Will leave your hands stained black - I do not recommend