it's a 2 decade old tech gimmick for a softer ride by using polyurethane bushing under your butt. They soften the ride with the truss design, but you get pedal bob robbing power to the pedals on every stroke. And the polyurethane wears down overtime.
Good thing is the LHT can take some fat tires, with the gravel bike trend, most tire brands only made up to 32c tires a decade ago, now they are making up to 48-50cx700 tires in different tread patterns from slick to gravel high rollers
If you plan to ride just paved roads, get a slick version of 40-45c tires and you can run the PSI way lower than say 28s that may be on the bike now = softer feeling ride and less road buzz plus lower roller resistance.
some good reads
https://granfondo-cycling.com/the-best-gravel-tire/
https://www.jensonusa.com/Surly-Extr...rial-700C-Tire
https://www.maxxis.com/catalog/tire-511-139-re-fuse
https://www.maxxis.com/catalog/tire-576-139-velocita-ar