Hey jorge-ecuador
In a perfect world boots and fins should be bought as a matched set (not by brand, color or style but by a "matched fit"). A matched fit is obtained by trying different styles and thicknesses of boots with different styles and sizes of fins. After all, if a $200 pair of fins does not fit well it will cramp your toes, arch and calf worse than a $74 pair that fits correctly.
For a marine biologist he will need a fin that will work in all conditions and be light enough to travel with, so some of the older designs like rocket fins are just to heavy and split fins don't work well in cross currents or turbulence. Take a look at the Mares Volo Powers, Quattro Excel or Aeris Velocitys but keep in mind fit is more important than technology or design.
The best fit of a fin is accomplished when the very first inch of fin foot pocket (top) fits snuggly (snug to tight) across the top part of your instep (dorsum of the foot) as close to the bend in your ankle as possible without going up the ankle (while your leg and toes are pointed out to simulate a swimming position).
A couple of quick hints:
1. The toes should not contact the end of the foot pocket.
2. Your heel should be 1" to 2" off the back of the fins striker plate (sticking out of the back of the fin)
3. It should not be tight on the balls (sides) of your feet
4. Have some one else compare the fit (tightness) across the Dorsum of your foot for a good comparison.
5. When the Dolphins come by and you do 3 or 4 "100 yard dashes" to keep up, 99% of the performance and comfort will come from fit (no blister/cramping) and 1% will come from design, technology and style.
After fitting over 100,000 divers and snorkelers in boots and fins if you call me with some sizing info we can get him something that will work for years to come.
Other toys to consider, cameras, knives, surface SOS kit, multi page slate and most important all of the Paul Humann Reef books.
Good Luck with your next Adventure.
Britt :fish:
:fish:
