The science
Your foam insole is leaking energy.
Every step, jump and landing loads your insole with force. Foam soaks it up and turns it into heat. A carbon plate stores it like a spring, then gives it back.
The energy return lab
Foam absorbs your energy.
Carbon gives it back.
What the testing shows
The numbers behind the spring.
Drawn from peer-reviewed research on carbon fibre insoles and our own testing with a certified pedorthist and real athletes. Carbon fibre insoles have been shown to increase vertical jump and sprint speed, with university testing recording average gains of 1 to 1.6 inches, and top responders adding 2.5 inches or more.
The V2 plate was worked on with NBA G League athletes through our pedorthist, Karl Kang. The kind of feet that punish a weak insole.
- 2–3 in
- average increase in vertical jump vs standard insoles
- 40%
- better shock absorption than a standard insole, measured in lab testing
- 25–30%
- lower peak impact forces on jumps, landings and cuts
- 38%
- reduction in plantar stress during long wear
- 73%
- of impact force dissipated by the support layer
- Full-length
- carbon plate for arch and midfoot stability
These are peer-tested results for carbon fibre insoles in general. Individual results vary with your training and how hard you load the plate. Not feeling it within 30 days? That is what the guarantee is for.
Not a gimmick. A structure.
The V2 is built in layers, each doing a job: a 100% carbon fibre baseplate for the spring, a high-support polyurethane layer for stability, a contoured arch that bends with your foot, and heel-to-toe shock prevention through the stack.
It is stiffer than the foam you are used to, on purpose. That stiffness is the spring, and it is why athletes describe the feel as "springy but firm" from the very first session.
100% carbon fibre plate, under a printed top sheet.
Anatomy of the plate
Four zones, four jobs.
The V2 is not one flat spring. Each part of the plate is shaped for what your foot does there, from the moment your heel lands to the instant you leave the ground.
Heel
Elastic shock absorption
Your heel takes the first hit on every step and landing. This zone is built to soak it up, with up to 40% better shock absorption than a standard insole, so your joints do less of the work.
Midfoot
Arch support and stability
A contoured, flexible arch supports the foot and keeps you planted through cuts and quick changes of direction, without ever locking the foot rigid.
Forefoot
Energy return and explosiveness
This is where the plate pays you back. Load stored through your stride releases at toe-off and adds to your acceleration off the ground.
Top cover
Comfortable polyurethane layer
A polyurethane top sheet sits between your foot and the plate for a comfortable, planted feel. The firmness you notice is the spring, not a hot spot.
The technology
A curve, not a flat sheet.
The V2 plate carries a real curve, tuned across the arch with 3D foot-scanning and plantar-pressure mapping. It works with the natural shape of your stride instead of fighting it, then springs back where a flat insole would just sit there.
Karl Kang, our certified pedorthist, built the V2 by working with NBA G League athletes. The curve and the carbon were tuned against feet that punish anything less, which is also why it stays comfortable through a full day and a full game.
The V2 design, drawn to the last millimetre.
Real feet, mapped in 3D and read for pressure before a plate is ever cut.
Certified design, not a marketing claim
Meet Karl Kang,
the pedorthist behind CRBN.
We didn't buy a generic insole and slap a logo on it. We built CRBN directly with Karl Kang, a pedorthist certified by the American Board for Certification in Orthotics, Prosthetics and Pedorthics, with over 25 years designing quality insoles. Through Karl, the V2 plate was worked on with NBA G League athletes.
- Certification
- Certified Pedorthist (ABC)
- Cert. number
- CPed4290
- Certified since
- April 2017 · current to 2027
- Trained at
- M.D. Institute of Biomechanics, Indiana
"My full endorsement, for both performance and support of athletic movement, including a tested average of two inches of added vertical."
Karl Kang · ABC Certified PedorthistFeel the difference, or send them back.
The science is only worth anything if you feel it on court. You have 30 days to find out.