13.1 LESS BLISTERS
Used it the first time for a pretty flat, half marathon walk. Thick without being greasy and uncomfortable. I don't have any blisters, so it must have worked! Update: hilly half marathon and I got I've got small blisters and one HUGE one where my orthotic slipped. All and all less blisters, but can't fight bad equipment!
Rating: 4 stars