I use the small trees on my pro minis and they are awesome! Not a drop of water in my ears after an hour of lap swimming. And the next day they went with me for an 8 mile run. The trees are thin so you can't jam them into your ears. You have to find the right pair that fit snug and once you do, it's very comfortable. (Posted on 3/3/12)

I bought the Pro Fit Kit to support my surface diving job, while listening with the "Surge Pro Mini Waterproof Headphones - Balanced Armature Driver", but none of the earplugs fit well enough to keep water out of my ears (I surface dive 3-10ft every day) for longer than 20 minutes. It may just be my ears! The 3-tier tree plugs are too weak to go in deep without bending an closing off the audio channel, so I haven't been able to use them. They material they use is VERY flexible and soft, so I guess I can't use them. I do use the 2-tier mediums to listen to music with their amazing headphones, and they work perfect at depths less than 3 feet (GREAT quality with the Pro Minis), but anything over that, and I get water in them. I have been trying all of the different plugs for about 21 days now. I'd love to see some plugs that are a bit more stiff (I had some knock-off nu-dolphin plugs that worked great, but I lost them in the water) (Posted on 7/23/11)

I was having some issue with the surges staying in my ears and saw the fit kit in the newsletter. I ended up using the small ones that look like trees and now they stay in perfect. The box is pretty nice too. I took out the foam and put my phone in it while I'm in the pool. (Posted on 10/8/10)