MADONNA
Scalp collector
Here are 35 everyday things under a microscope
http://www.danoah.com/35-everyday-things-made-so-insanely-cool-under-a-microscope
http://www.danoah.com/35-everyday-things-made-so-insanely-cool-under-a-microscope
Yes they are there are a few asd's around. I have 2 extra snap in FCS Fins which have that technology. I also have most of my boards glassed with a zebra print on the bottom V. Dunno if it works but I haven't been bit!This new wrist device with magnetic technology looks promising.
http://www.sharkbanz.com/
https://www.facebook.com/sharkbanz