Great product, but concerns about quality.

I bought these to confirm that arch support, or lack thereof, was the issue I was experiencing. I only experience arch pain on one foot, so I only wear one sleeve at a time, alternating days between the two. Initially I used them above the socks, but after a couple of days they stretched out, and would slip down the sock towards my toes. For the last month I've been wearing them directly against my skin, and they do work! The arch pain was relieved on the first day, and has improved even when I take the sleeve off. Based on my experience, and for the price, I'd ordinarily give 5 stars. However, one of the two sleeves quickly stretched out along the seam, and is noticeable less effective and likely to slip. Since I only use one at a time, that means one sleeve's ability to provide relief disappeared within the first 5-7 uses. For this I'm taking a couple of stars off, as I would hope to not have to continually re-purchase sleeves.

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