The Fish Filet Gloves have steel fibers woven into the material and fins will not penetrate . A fin puncture is painful because the slime is slightly toxic, causing most of the pain. Hand SANITIZER does work to stop the toxicity, Hince the cut stops hurting and it will not get infected. I keep a small bottle in the Tackle Box , and a bigger bottle in the storage box . I just saw at Tractor Supply a card with those small Glass capsules for wasp stings,it also takes the sting out of jelley fish. You never know when someone else will need something like this more than you do, like grandkids!!!!!