ShoesVivobarefootPrimus Trail
Vivobarefoot
Vivobarefoot Primus Trail 3
Barefoot trail shoe. Wide toe box, thin sole, maximum ground feel.
PR Run scores
PR Run derived fit scores
100-miler readiness
Will this shoe survive a hundred-mile night? 8 mm stack, cushion 1/5
Descent tolerance
Does it save your toenails on long descents? 8 mm forefoot, heel counter 2/5
Swelling room
Room to grow when your feet swell? 28.9 mm toebox height
Grit resistance
Does dust stay outside the shoe? moderate BR breathability
Hot-day comfort
How well does it breathe in heat? Standard mesh
Achilles-friendly
Kind to a cranky achilles? 0 mm drop, heel counter 2/5
Full specs
Drop
0 mm
Heel stack
8 mm
Forefoot stack
8 mm
Weight
228 g
Lug depth
3 mm
Plate
No
Waterproof
No
Foam
Minimal
Lab measurements
Fit intelligence
Toebox width
Narrow toebox (78.5 mm vs 96 mm median)
Toebox height
Tall toebox (28.9 mm vs 25 mm median)
Fit intel pending.
Fit numbers from the lab. Swell guidance: foot care.
Questions before you race
Is the Vivobarefoot Primus Trail 3 good for 100-mile races?
Weak. 8 mm stack, cushion 1/5. 100-miler readiness score 30/100.
Does the Vivobarefoot Primus Trail 3 fit wide feet?
No. Toebox is 78.5 mm which is narrow. Look elsewhere if you need width.
What is the drop on the Vivobarefoot Primus Trail 3?
0 mm, with a 8 mm heel stack and 8 mm forefoot.
Is the Vivobarefoot Primus Trail 3 good on wet rock?
Traction coefficient of friction on wet lab surface: 0.84. Elite grip on wet rock.
New lab data on soft trails shoes, once a month.
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swellingRoom: 100/100 (Elite)
descentTolerance: 43/100 (Passable)
gritIngressRisk: 37/100 (Passable)
hotFootScore: 24/100 (Weak)
achillesFriendlyScore: 100/100 (Elite)
hundredMilerReadiness: 30/100 (Weak)