Fisherman's Thumb is a neoprene thumb guard to prevent the raw thumb you get when lipping all of those fish you are catching from a good day on the water. So if a raw and bleeding thumb has been your problem, good job and give Fisherman's Thumb a try.
Also good for use when gardening to protect against thorns, thistles and briers.
Note: These fit snug on a mans thumb but may be loose on a woman's thumb.