5 out of 5
Product Description
Manufacturer Part Number: 2.35.100
DESCRIPTION
The Positive Drive Fins (PDF's) use a unique ellipsoidal blade to generate correct propulsion in all four swim strokes. The asymmetrical blade design allows the swimmer to build power while promoting a natural inward supination kick style for butterfly, backstroke and freestyle. The PDF's use an ergonomic foot pocket to comfortably place feet in an ideal swimming position. The heel strap secures the fin, allowing feet to flex more naturally. A closed toe design provides superior energy transfer from leg to foot. The PDF's will increase leg strength, foot speed and ankle flexibility for all four swim strokes, making the fins great for individual medley training.
For more information, please see our Training Fins Reference Guide or our Kid's Fins Reference Guide.
FEATURES
CARE INSTRUCTIONS
EDUCATION
Tech Sheet
Comparison Guide
FAQ'S
DESCRIPTION
The Positive Drive Fins (PDF's) use a unique ellipsoidal blade to generate correct propulsion in all four swim strokes. The asymmetrical blade design allows the swimmer to build power while promoting a natural inward supination kick style for butterfly, backstroke and freestyle. The PDF's use an ergonomic foot pocket to comfortably place feet in an ideal swimming position. The heel strap secures the fin, allowing feet to flex more naturally. A closed toe design provides superior energy transfer from leg to foot. The PDF's will increase leg strength, foot speed and ankle flexibility for all four swim strokes, making the fins great for individual medley training.
For more information, please see our Training Fins Reference Guide or our Kid's Fins Reference Guide.
FEATURES
- UNIQUE BLADE DESIGN: Ellipsoidal blade generates correct propulsion in all four swim strokes - even breaststroke
- ASYMMETRICAL FINS: Blade shape promotes a natural kick cycle
- EFFECTIVE TRAINING: Increases leg strength, foot speed and ankle flexibility - Great for training the individual medley event; Safely build a powerful breaststroke kick
- ERGONOMIC FOOT POCKET: Comfortably places feet in an ideal swimming position
- ADJUSTABLE HEEL STRAPS: Create a customized fit that secures fin and allows feet to flex more naturally
CARE INSTRUCTIONS
- Rinse in cool, non-chlorinated water after each use.
- Leave to air dry on a towel.
- Please avoid leaving in direct sunlight for extended periods, as it may damage the material.
EDUCATION
Tech Sheet
Comparison Guide
FAQ'S
| Size (code) | US Male | US Female | Euro |
|---|---|---|---|
| XS (03) | Y 8-13 | Y 8-13 | 31-33 |
| S (04) | 1-3 | 2-4 | 34-35 |
| M (05) | 3.5-6 | 4.5-7 | 36-37 |
| L (06) | 6.5-8 | 7.5-9 | 38-40 |
| XL (07) | 8.5-10 | 9.5-11 | 41-43 |
| XXL (08) | 10.5-13 | 11.5-14 | 44-45 |
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
Need more information?
Our staff are available to answer any questions you may have about this item
Our staff are available to answer any questions you may have about this item
Customer Reviews
By Luke Liem
Date: November 16, 2025
I have tried out several swimming fins for improving my breaststroke. The idea is to see how swimming fins can push the speed limit of this under-rated and under-researched swimming style. For 25 yards, I easily cut the time from 24-25 seconds to 22-23 seconds, just on my first few attempts. Using these fins also help me gain insights on possible ways to improve my kicks, which account for most of the propulsion for breaststroke.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By michael colpitts
Date: July 27, 2025
Love that the design of fins as they did not irritate my feet bones and cause inflammation like other fins did. Only problem was the the left foot, the back strap always loosened and I had to tighten continually.
Rating: 
[4 of 5 Stars!]
[4 of 5 Stars!]
By Daniel Castro
Date: May 02, 2025
I have not been able to use them as the pool where I was to use them could not keep it from being contaminated with fungus and mildew Ymca Tifton, Georgia. Sad reported them to the health department. Nothing was done.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By MBT fan
Date: October 26, 2023
Great fins for practice even for beginners. Select right size.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Anon.
Date: March 17, 2023
UPDATE-Amazing feedback for optimal "slicing" position of feet. LOVE them as that side to side "flutter" went away after 3 weeks of use so that likely means that my "stabilizing muscles" that hadn't been activated got activated and adapted/grew. I now would like to assert that these aren't "specialty" fins but are the only fins one needs for competitive swim training. WOW! works VASTLY better than hoped for breast stroke and side stroke (I am an old school Lifeguard; and will always keep up my side stroke performance) kicks!!! TRULY optimized for these kicks. On scissors kick, I did notice a side to side "flutter" or "shudder", not performance robbing; and I actually believe that ones tiny leg "stabilizing" muscles will get developed to counter act this motion. So, SUPER for breast stroke kick; and good, but not optimized for, scissors kick. I wear a 13 shoe and the XLs are a perfect fit!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By N. Cohen
Date: February 24, 2023
This is my second pair of these and they work great. I only had to get a second pair because I lost my first one.
Rating: [4 of 5 Stars!]
[4 of 5 Stars!]