The mash-up collection usually starts with a few beers, and several "what ifs". What if we took the silo upper and put the tribo sole on it? What if we took the iconic Accel Slim and put the amazingly skatable Quattro sole on it? What if we did two color packs in iconic eS colorways? Turned blind toe seam for added durability. Spandex tongue straps. Minimal tongue and collar padding. Breathable tongue mesh. 400 nbs rubber cupsole. STI eneryg foam midsole.