Military > Fins > Bio-Fin Ranger

Bio Fin Ranger With Spring Strap is a lighter more compact tactical split fin made from 100% natural rubber material designed specifically for Military and SAR operations and are ideal for helicopter and parachute insertions.

  • Features

    • Wide foot pocket designed for use with amphibious and combat boots.  Also well suited for high profile over boots and divers with wider than average shoe size.
    • Tough 100% natural rubber combined with 75º durometer provides exceptional maneuverability and explosive thrust
    • Dynamic split blade technology proven to reduce fatigue and maximize endurance
    • Negatively buoyant, if operator is required to discard, fins will sink to bottom so as not to alert others of operators presence
    • Secure stainless steel spring straps eliminate strap and lug breakage.  Easy to don and remove
    • Increase footwear options with alternate size spring sets
    • New adjustable rubber strap assembly available. Customized for use with Ranger fins
    • Manufactured In Japan
  • Split Fin Technology

    Bio Fins provide lift and propulsion with less effort and more power.  Unlike other fins which push water up and down, Bio Fin blade directs water flow over the leading and trailing edges to provide power, lift and forward thrust on each stroke.


    Efficient Kick A wider kick results in loss of momentum. Whether your traveling at cruise speed or powering through current keep your kicks small.   You will move quicker and more efficiently.

  • Size | Item Numbers













    Thick Sole Over Boot 10~12

    Amphibious & Military Footwear 8~10

    423 x 252mm, 1200g

    w/ Rubber Strap USA#150-39-80-500 [1503980500, FN08490]

    w/ 250mm Silver Spring USA  #155-R4-80-250  [1503980225]

    w/ 275mm Silver Spring USA  #155-R4-80-275  [1503980227]

    w/ 300mm Silver Spring USA  #155-R4-80-300  [1503980230]

    w/ 325mm Silver Spring USA  #155-R4-80-325  [1503980232]

    w/ 350mm Silver Spring USA  #155-R4-80-350  [1503980235]

    w/ 375mm Silver Spring USA  #155-R4-80-375  [1503980237]


    Thick Sole Over Boot 12~

    Amphibious & Military Footwear 10~**

    423 x 252mm, 1200g

    w/ Rubber Strap 150-39-80-600 [1503980600, FN08491]

    w/ 250mm Silver Spring USA #155-R5-80-275 [1503980425]

    w/ 275mm Silver Spring USA #155-R5-80-275 [1503980427]

    w/ 300mm Silver Spring USA #155-R5-80-300 [1503980430]

    w/ 325mm Silver Spring USA #155-R5-80-325 [1503980432]

    w/ 350mm Silver Spring USA #155-R5-80-350 [1503980435]

    w/ 375mm Silver Spring USA #155-R5-80-375 [1503980437]

329.00 - 379.00

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