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Men's Synchron 2020 Jet Black/Glacier Grey
SIZE IN US MEN
SKU_F100275
The all new Synchron 2020 offers the latest in footwear advancements including an AeroFoam Nova midsole and Ideal Knit upper. The Synchron 2020 is designed for the runner looking for maximal cushioning and plush underfoot feel without compromising an efficient transition.
The Synchron 2020’s AeroFoam Nova midsole provides a more luxurious cushioning experience than traditional EVA compounds found in most shoes. An internal stingray shaped composite fulcrum is dropped into the AeroFoam Nova midsole material which helps transition momentum through the gait cycle efficiently. The Synchron 2020’s Ideal Knit mesh upper fits comfortably while securing the midfoot. The forefoot showcases the classic asymmetrical lace across the toe box to allow for micro-adjustments to the fit.
The Synchron 2020’s AeroFoam Nova midsole provides a more luxurious cushioning experience than traditional EVA compounds found in most shoes. An internal stingray shaped composite fulcrum is dropped into the AeroFoam Nova midsole material which helps transition momentum through the gait cycle efficiently. The Synchron 2020’s Ideal Knit mesh upper fits comfortably while securing the midfoot. The forefoot showcases the classic asymmetrical lace across the toe box to allow for micro-adjustments to the fit.
Karhu Feet Measurement And Table

Place a piece of paper on the floor with one end against the wall.
Put your foot on the piece of paper with your heel against the wall
Put your foot on the piece of paper with your heel against the wall

Take a pencil and mark the end of your longest toe on the paper.
Repeat for your other foot.
Repeat for your other foot.

Measure in cm from the wall (heel) to the longest point (toe).
Take the larger measurements. Than take what you measured + 0.5 CM and compare it with our shoe sizes in the size chart.
Feet Measurement (in centimeters) |
US Men Size |
US Women Size |
EU Size |
UK Size |
23 | 23.4 | 23.8 | 24.3 | 24.6 | 25.1 | 25.5 | 25.9 | 26.3 | 26.8 | 27.2 | 27.6 | 28 | 28.5 | 28.9 | 29.3 | 29.7 | 30.1 | 30.6 | 31 |
4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 14 |
5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | - | - | - | - |
35 | 36 | 37 | 38 | 39 | 39.5 | 40 | 40.5 | 41.5 | 42 | 42.5 | 43.5 | 44 | 44.5 | 45 | 46 | 46.5 | 47 | 48 | 49 |
3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | - |
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INFO
The all new Synchron 2020 offers the latest in footwear advancements including an AeroFoam Nova midsole and Ideal Knit upper. The Synchron 2020 is designed for the runner looking for maximal cushioning and plush underfoot feel without compromising an efficient transition.
The Synchron 2020’s AeroFoam Nova midsole provides a more luxurious cushioning experience than traditional EVA compounds found in most shoes. An internal stingray shaped composite fulcrum is dropped into the AeroFoam Nova midsole material which helps transition momentum through the gait cycle efficiently. The Synchron 2020’s Ideal Knit mesh upper fits comfortably while securing the midfoot. The forefoot showcases the classic asymmetrical lace across the toe box to allow for micro-adjustments to the fit.
The Synchron 2020’s AeroFoam Nova midsole provides a more luxurious cushioning experience than traditional EVA compounds found in most shoes. An internal stingray shaped composite fulcrum is dropped into the AeroFoam Nova midsole material which helps transition momentum through the gait cycle efficiently. The Synchron 2020’s Ideal Knit mesh upper fits comfortably while securing the midfoot. The forefoot showcases the classic asymmetrical lace across the toe box to allow for micro-adjustments to the fit.