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Merrell Agility Synthesis Flex

Overall Grades And Reviews

8.6 Overall Grade
1 review

How This Shoe Compares To Its Competitors

Note: None of our partners have this shoe for sale.
Overall Rating among all shoes reviewed by LetsRun.com readers:
Black

LetsRun.com Reviewer Ratings

Shoe Comparison

Shoe comparison
Merrell Agility Synthesis Flex
HOKA ONE ONE Speedgoat 6
HOKA ONE ONE Stinson 7
ASICS Novablast 5
Image
Merrell Agility Synthesis Flex
This Shoe
HOKA ONE ONE Speedgoat 6
Top Rated Trail Shoe For Sale
HOKA ONE ONE Stinson 7
Next Most Comfortable Trail Shoe For Sale (after this shoe)
ASICS Novablast 5
Top Rated (All Shoes)
Shoe Properties
Shoe Type
Trail
Trail
Trail
Trainer
Pronation Control
Neutral
Weight
9 oz. (men's), 7 oz. (women's)
10 oz. (men's), 8.5 oz. (women's)
12.1 oz. (men's), 10.6 oz. (women's)
Stack Height
44mm.
Forefoot Height
39mm.
Drop Height
8 mm.
5 mm.
Upper material
GORE-TEX Invisible Fit waterproof membrane provides weather protection. Internal support chassis offers a secure lockdown. Dual-sided gusseted tongue improves step-in comfort. Dynamic vamp allows for more forefoot accommodation. Toe bumper protects agains
Shoe Released
Q2 2018
Q2 2024
Q3 2023
Q4 2024
MSRP
$110
$170
LRC Ratings
Out of 10
Overall
8.6
8.9
8.4
8.7
Comfort
8.7
8.9
8.3
8.7
Cushioning
8.5
9.1
8.7
8.2
Durability
7.9
8.5
7.4
8.0
Appearance
8.3
8.3
7.7
8.3
Value
8.1
8.5
7.5
7.9

Reader Reviews

  • OK trail and/or road shoe

    40 miles per week, neutral pronator, medium arches
    Overall
    8.0
    Comfort
    8.0
    Cushioning
    8.0
    Durability
    7.0
    Appearance
    8.0
    Value
    8.0

    I’m a sucker for a curved last as I believe speed and active responses are faster so my marks are higher with this Merrel Synthesis Flex shoe because a flat last means flatter times. The tongue is shorter but I did not like that because I like a small amount of tongue to adjust with looped laces usually tucked under the tied laces. It’s a pet peeve of mine and this shoe just might not have a bit longer tongue which looses star points. Whoopsie. The upper felt soft and flexible and was able to adequately keep flying tree limbs and rocks at bay. The midsole could be a bit stiffer as the comfort was there but not the stability factor. I could flex the whole shoe but I don’t like that aspect because I think stiffness keeps my ankles healthy and stable. The cushion and bottom tread were both good for keeping my knees happy. The ankle height was fine. No rocks got in and the shoe held up in mud or water just fine. overall aesthetic vision was iffy... I like a bit wider of a toe box in a curved last because my toes need breathing room and this shoe does not provide my toes well...especially after long runs when my feet swell. Negative stars there. The color was ho-hum...green/blue/black...such typical colors. Overall a good shoe outside of the things I mentioned. I have an extra two dead toe nails due to the Synthesis Flex but I ran over 500 miles in them and they still have a little bit more to go so... something is right there. Cheers

    Kenny McFadden

    dtmelite@gmail.com

    1-360-784-9073 (C)