Bàn luận về chân nhái thợ lặn (P3)

Chân nhái "quân lực"  và chân nhái "quân lực dân sự hóa" (để biết):

Original Force Fin

Our most versatile and still our best-selling fin, this is the one that started the fin design revolution. Proven in U.S. Navy sponsored research to be among the most efficient of 35 fins tested on 200 subjects kicking against a current. Our softest and easiest-kicking Force Fin. Ideal for fin users who relish a feeling of freedom under or on top of the water. Features: patented toes-free foot pocket to reduce cramping and leverage the power of the large muscles in your upper thigh. Also, features our patented upcurved V-shaped blade to channel water for maximum control and thrust. Add the snap of the blade to create our patented power and recovery generated kicking cycle and you can kick comfortably and aerobically. This is the basis for the high efficiency ratings of Force Fin shaped blades. 

Slim Fin

Swim your way to fitness, strength and a firmer body. With Slim Fins you: increase ankle flexibility, develop leg strength, burn more calories, increase fitness and conditioning levels, improve your body position and technique, and slim thighs and tighten buns. Features: patented toes-free foot pocket that reduces cramping and leverages the power of your kick from your thighs and buttocks. Snappy blade helps maintain kick cadence.

Beaver Force Fin

Designed from observing beavers -- and especially their flexible tails -- in action, our newest snorkeling fin holds the surface well and is easy to kick. Features: a one-size-fits-most Adjustable Foot Pocket with integrated Comfort Instep Bungie Heel Strap, Vortex Generators, and it's adaptable for Force Wings for variable thrust and added propulsion. Whiskers not included, but may be purchased as an add-on item.

Multi Force Fin

If you're looking for a short-bladed swim training fin, look no further! The Multi Force Fin gives you a more intense workout plus an increase in swimming speed that puts your body in the right position and pinpoints any technique flaws. Incorporates a swim-specific blade that can be used by itself or with Force Wings (pictured with Sharks' Teeth) to adjust thrust or drag. Features: a one-size-fits-most Adjustable Foot Pocket with integrated Comfort Instep, Bungie Heel Strap and Vortex Generators. Shark's Teeth not included, but may be purchased as an add-on item.

 Adjustable Rip Force

Body surfers and body boarders can really rip it up with this updated Rip Force with its quick acceleration for tricky take-offs and superior ruddering capabilities. Try the Rip Force with added Sharks' Teeth focused inward for vector thrust on steep drop ins. Super comfortable cushioned foot pocket stays on even in the most slam'en wipe out. Polyurethane is doesn't float, so be sure to secure with fin tethers just in case. Features: a one-size-fits-most Adjustable Foot Pocket with integrated Comfort Instep Bungie Heel Strap, Vortex Generators, and it's adaptable for Force Wings for variable thrust and added propulsion. Whiskers not included, but may be purchased as an add-on item

Pro Model Force Fin

Our best selling scuba diving fin. Preferred by Special Forces throughout the world. Chosen by Jens Hilbert to set the current underwater swimming world's record. Ranked among the most efficient in U.S. Navy sponsored research in which oxygen consumption was measured on 200 subjects kicking against a current wearing 35 different fins. Stiffer and with more snap than the Original Force Fin, the Pro Model Force Fin is designed to handle the extra leverage needed by a diver with a powerful kick. Features: patented toes-free foot pocket to reduce cramping and leverage the power of the large muscles in your upper thigh. Also, features our patented upcurved V-shaped blade to channel water for maximum control and thrust. Add the snap of the blade to create our patented power and recovery generated kicking cycle and you can kick comfortably and aerobically. These are the basis for the high efficiency ratings of Force Fin shaped blades. Preferred government/military sales item.

Tan Delta Force Fin

By maximizing the "Tangent Delta" - The amount of energy recovered for the energy applied to any material - we've made the ultimate snappy model of Force Fin, and it's the snap of the blade that gives you maximum propulsion efficiency. Beautiful enough to be in the permanent collections of the New York Museum of Modern Art, each pair is personally signed by fin designer Bob Evans. Features: patented toes free foot pocket that reduces cramping, and upcurved V-shaped blade that channels water for maximum directional control and thrust.

Adjustable Float Tube Force Fin

Our patented fin shape is just right for kicking in the upright position required when sitting in a float tube, pontoon boat, or other type of personal fishing craft. Perfect for large wading or hiking boots (try the Original Force Fin if you use neoprene waders or have small feet). There is simply no better float-tube fin! Features: a one-size-fits-big Adjustable Foot Pocket with integrated Comfort Instep and Vortex Generators. (Now also available with a Velcro-free, side-release-buckle, foot-pocket strap!).