What They Have in Common
Both are 48 inches wide. Both use an offset hitting position — the hitting panel or strip sits to one side, with stance area beside it. Both take real tees. Both list at essentially the same price. That's about where the similarity ends.
Where They Differ
Size
This is the biggest gap. The Fiberbuilt Grass Series Traditional 5×4 is 60 inches long. The SIGPRO Softy 4×10 is 120 inches long. Same width, double the length. That extra 5 feet isn't just floor space for its own sake — the SIGPRO explicitly calls out room for a launch monitor beside the strip. The Fiberbuilt at 5 ft × 4 ft takes half the floor; the SIGPRO at 10 ft × 4 ft commits to a dedicated bay footprint.
The Hitting Surface
The Fiberbuilt uses its Grass panel — a 1 ft × 4 ft hitting section with four tee holes — alongside a 4 ft × 4 ft Performance Turf stance mat, all sitting on a one-piece solid rubber foundation. That base is one piece rather than modular sections. The Fiberbuilt Grass panel also carries a 300,000-shot guarantee, which Fiberbuilt prints in their marketing. The SIGPRO's hitting strip is 1-inch Teeline turf over a foam insert with a responsive ABS polyurethane layer and three compression slots. SIGPRO publishes no shot guarantee for it.
On wear: the SIGPRO's strip is replaceable — when it wears down, you swap it. Fiberbuilt doesn't publish whether the Traditional 5×4's panel can be replaced at all.
Thickness and Weight
The SIGPRO publishes a thickness of 2.5 inches and a weight of 31 lbs. Fiberbuilt publishes neither for the Traditional 5×4. If thickness matters for your setup, the SIGPRO gives you a figure to work with and the Fiberbuilt doesn't.
One note on the SIGPRO: its strip height is listed as 2⅜ inches in one place and 2½ inches on the 4×7 version. Those numbers don't match, and I can't resolve it from the published specs.
Warranty
Fiberbuilt gives you 5 years on the rubber base and 1 year on the turf and stance mat. That's a real warranty. The Indoor Golf Shop publishes no warranty for the SIGPRO Softy 4×10 at all.
One more thing: the Fiberbuilt's tee listing writes the included rubber tee as 2.265 inches where every other Grass product page says 2.625 inches. That's probably a typo, but it's on their page.
Who Should Buy Which
Get the SIGPRO Softy 4×10 if:
- Your bay has 10 ft of floor to work with and you want a mat that grows with your setup
- You're running a launch monitor and need to know the mat's thickness before you buy
- Long-term cost matters to you and a replaceable strip is how you want to handle wear
Get the Fiberbuilt Grass Series Traditional 5×4 if:
- Floor space is genuinely limited and 5 ft is the most you can give a mat
- You want a documented warranty on the base (5 years) and the one-piece foundation matters to you
- The 300,000-shot Fiberbuilt Grass guarantee factors into your buying decision
The Bottom Line
A $0.99 price difference between a 5 ft mat and a 10 ft mat with a replaceable strip and published specs is not really a decision. The SIGPRO Softy 4×10 does more, tells you more about what you're buying, and leaves you with a path when the hitting surface eventually wears out. The Fiberbuilt's one-piece foundation and 5-year base warranty are genuinely good — but they're harder to weigh against the SIGPRO when Fiberbuilt won't tell you the mat's thickness or weight.
Get the SIGPRO Softy 4×10.