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- USA
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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
FCS II REACTOR MATT BIOLOS TRI FINSFCS II REACTOR MATT BIOLOS TRI FINS Overview The MB template offers surfers the freedom to perform tight turns in the pocket with an emphasis on speed down the line. Sitting in the reactor family, the MB is considered a surfer's high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force. Tri Fin set. Ideal Conditions A wide range of surf conditions, particularly
FCS II REACTOR MATT BIOLOS TRI FINS
Overview
- The MB template offers surfers the freedom to perform tight turns in the pocket with an emphasis on speed down the line.
- Sitting in the reactor family, the MB is considered a surfer's high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.
- Tri Fin set.
Ideal Conditions
- A wide range of surf conditions, particularly good in critical overhead waves.
Board Types
- Designed to fit the FCS II Fin System.
- Performance shortboards and hybrid models.
MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)
LARGE (75Kg - 90Kg / 165 - 200 Lbs)
| Fin |
Base (inches) |
Base (mm) |
Depth (inches) |
Depth (mm) |
Area (inches) |
Area (mm) |
Sweep Deg° |
Foil |
| MED | 4.3 | 109 | 4.59 | 116 | 14.49 | 9347 | 31.9° | Flat |
| MED (Q-Rear) | 4.09 | 104 | 4.26 | 108 | 12.63 | 8150 | 32.4° | 80/20 |
| LRG | 4.41 | 112 | 4.74 | 120 | 15.26 | 9847 | 31.9° | Flat |
| LRG (Q-Rear) | 4.09 | 104 | 4.26 | 108 | 12.63 | 8150 | 32.4° | 80/20 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 904 reviews
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Product Reviews
★★★★★ 4
Great socks / a bit expensive
Size: Large, Color: Black
These may be the Goldilocks of the socks I've tried. They have nearly the same quality as the MUCH pricier Darn Tough Vertex Ultralight Cushion Cool Max socks (also reviewed). They have better quality, and a higher price, than a similar pair of PUMA socks (also reviewed).
Pros: Very well made, with no loose stitching, comfortable forefoot and heel cushioning, good ventilation via top mesh, good arch compression, minimal logos and mostly solid color.
Cons: Price is a bit on the high side, but better than the Darn Tough socks.
I could honestly have made a good case for any of these three (ASICS, PUMA, or Darn Tough), which explains their collective high ratings. I did the top 3 reviews first. When I get a chance, I'll go back and review the average and terrible :)
If money is no object, get the Darn Tough Vertex. If you're price sensitive, and willing to compromise a bit on quality, go with the PUMAs, which is what I did. Otherwise, these ASICS are near the same quality as the Darn Tough, but less expensive. Tough decisions :)
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Reviewed in the United States on May 9, 2017
★★★★★ 5
They fit perfectly
Size: X-Large, Color: Black
My favorite socks, the fit is great, they are comfortable and they are long enough so it covers my ankles, therefore, they don't rub against my inner shoe.
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Reviewed in the United States on June 6, 2024
★★★★★ 5
Great buy.
Size: Medium, Color: Black
These socks have a cool fresh feel to them. I bought new running shoes, Hoka Bondi 9, and they feel great paired up with them. Similar socks in the store were $49. I tried several others brands like Sauchony and 2 other lesser known brands but there was something indescribably different. I purchased another pack immediately.
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Reviewed in the United States on November 11, 2025
★★★★★ 5
Comfort
Size: Medium, Color: Black
I have been wearing ASICS socks since forever! As a distance runner, I have worn many others from different companies, and I always come back! Also, i am not a fan of the invisible kind, and ASCIS seems to be the only ones to make the socks that are above the shoe, are durable, comfortable, I have no desire to look elsewhere. Thanks ASICS!
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Reviewed in the United States on December 7, 2023
★★★★★ 5
Comfort is #1
Size: Medium, Color: Black
Very comfortable and it does absorb the moist of my feet. Great fit and quality.
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Reviewed in the United States on April 14, 2026