MultiFuse (TM) is how these bands are built, not just what they're called. Almost every resistance band on the market — certainly everything stacked on the mass-market retail sites — is a single piece of molded rubber. Each MultiFuse band is bonded from multiple ultra-thin sheets of latex instead.

Layered against molded

A molded band fails all at once. It's one continuous piece, so a nick picked up from a door frame, a rough anchor point or a concrete floor gives a tear a clear run through the entire band. And when it lets go, it lets go under tension — at the moment you're pulling hardest against it.

Layering interrupts that. Every bonded sheet is a boundary, so damage tends to stay in the layer where it started rather than running through the whole band. What you notice over months is a band that gradually loses a little snap, instead of one that's perfect right up until it isn't.

Layering is slower and more expensive to manufacture than molding. That's the entire trade, and it's the only reason to care what MultiFuse means.

The set

Five bands covering 3 to 120 lb of resistance. All five are 41 inches long and 0.18 in thick, so they stack together predictably and you can combine two rather than jumping a whole level.

3–30 lb — 1/4 in wide
5–50 lb — 1/2 in wide
10–60 lb — 13/16 in wide
25–80 lb — 1-1/4 in wide
50–120 lb — 1-3/4 in wide

What it's for

Assisted pull-ups are the obvious use, and the reason most people buy a set: loop a band through the BULLBAR's band anchors, take enough weight off to complete strict reps, and step down through the set as you get stronger. It's the most reliable route to a first unassisted pull-up.

Away from the bar the set covers presses, rows, pulls, squats and mobility work. Band tension climbs through the range rather than staying constant like a dumbbell, so resistance is highest where your leverage is best. The whole set packs into its own carry bag and weighs about two pounds, which is why it's the piece of equipment that actually travels.