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You heard right, it's like a cybernetic stallion from the future.

If the Union MC Metafuse Binding were an animal, it would be a bad-ass fire-breathing cybernetic stallion sent from the future to intimidate faint-hearted mammals with its fierce technology. The MC gets its incredible light weight and steel-like resilience from a futuristic nanocrystal metal particle coating (each particle’s 1/75,000 the width of a human hair) over the Dupont Zytel ST Nylon heel loop. Because the heel loop shape can be injected, it sits flush with no gap between it and the highback for uninterrupted energy transmission. This advanced technology, plus carbon fiber and CNC milling throughout, result one freakishly lightweight binding (under three pounds per pair)—the flagship (and robot hell-stallion) of the advanced Union Atlas Series and the future of performance bindings.

  • Asymmetrical/Symmetrical Carbon-fiber highback reduces weight while still allowing the highback to flex
  • Stage III base is carbon-injected for stiffness and response and CNC-machined for super light weight
  • Magnesium ratchets with aluminum cores shave weight and hold up for many seasons to come
  • Air Core strap uses a supportive internal honeycomb foam construction cutting out the density and therefore the weight
  • Carbon fiber toe ramp lets your foot sit at the comfortable and supported angle
  • Universal discs included to fit all types of insert patterns include 3-hole and a set of channel-friendly discs with stance window
  • Machined aluminum allen hardware is stronger but only a quarter of the weight of standard hardware

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Union MC Metafuse Binding

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2 5

Steer clear of the 2012 MC Metafuse

  • Gender: Male
  • Familiarity: I've put it through the wringer

Featherweight, extremely comfortable, and fragile.

The heelcup snapped completely off my left binding while I was riding, and on inspection, my right binding looks like it's about to give as well.

Though I got 8 responsive and comfortable days of riding on them before the binding gave (leaving me tumbling down a hill, disoriented and confused), I'd expect bulletproof reliability for the premium bucks spent. Union is great about warranties but I doubt I'll risk using the replacement I get considering the frequency with which these things seem to break (based on similar reviews and experiences).

Steer clear of the 2012 MC Metafuse
2 5

Great ride until they broke.

I had two days on these bindings. The first day out of the box was great, incredible feel and control. The toe strap is designed to work in both over the toe and toecap mode, for my boots (Salomon Malamute) the toecap option would not hold well and kept slowly sliding back in to over the toe position—not a big deal and probably boot dependent.

Now the bad news; on the second day of riding while unstrapping, I noticed that the heelcup on the right binding had broken. It appears that the Zytel material fractured at a stress point where the heelcup meets the bolt that adjoins it to the baseplate. I would have assumed it was a one time random flaw in the injection mold of that individual part if I didn't see that another backcountry customer review had the exact same experience with this binding.

I think Union is a good company and maybe there was a bad batch in the molding process. I am going to give the MC MetaFuse another shot and will report back here on any issues.

Again, when they were performing properly they were an amazing piece of gear, but given my experience I cannot recommend them at this time.

Great ride until they broke.
Responded on

this happened to me as well broke both heel cups within 3 days of riding with them

1 5

Very light, not so strong

Just got a set of MC Metafuse for Valentine's day. As I was getting my board out on the fourth use I noticed that the heelcup had snapped totally in half. Last time out I felt totally out of control and now I know why.

No terrain park, no features, no crashes. Just three times out.

Now we will see what kind of customer service Union has. Sent them an email, but have not heard back from them.

On the plus side, before they broke in half, they were totally awesome comfort and control wise.

Very light, not so strong
Responded on

had the same experience were great bindings until they broke within 3 days, mine broke in the same spot i'm sure its from turn on my toe side ( i ride natural) no park/ jumps just riding down hill at Jackson Hole

1 5


Both my buddy and I bought these bindings 1 week ago. 1st day was a Snowbird, and the bindings were great. Lightweight, stiff, real sick. 2nd day was hiking backcountry lines at Park City, again, lightweight bindings, great for hiking. Then the baseplate breaks (right where the lateral part of the heel strap connects to the baseplate). It completely fractures all the way through the base plate. My buddy has his baseplate fracture on the 3rd day (this one actually had the entire heel-cup break off). These bindings are poorly made.

Responded on

Mine did the exact same thing. Heelcup snapped all the way through on third day of use.

Responded on

That is too bad, I'll have to talk to a guy I know who does QC at the factory that makes Union bindings here in China. Sorry guys, don't let that further the "made in China" stereotype!

Responded on

A friend uses these and he hasn't had any problems with them. Personally, I think they look cheap and as people here (and Backcountry) have reviewed, they don't stand up to a beating. For Union lovers, I would have gone with some SLs or even Forces and saved money. However, for those carbon fiber lovers, definitely Burton Diodes. Used them, loved them, just can't justify spending $300+ for 'em.

Responded on

they suck i wish they whould go die in a hole eat cicken my brother nininin mj was my brother suck his white chicken bitch

5 5


I've tried several bindings over the years,from top of the line Burton bindings to Ride and just recently broke a pair of Flow bindings. The New Union MC bindings are hands down the best binding on the market! They are feather light, ultra responsive feel from heel to toe and lateral flex! This years ankle strap is super comfy, no pressure points at all.

Responded on

Is the stiffness of these comparable to Flow's FSE or FRX models?