Prologo kappa evo t20 saddlethis prologo kappa evo t2 it is used in the aerospace industry to make mechanical arms so is a great compromise between mechanical resistance and strength on top of the rails is a light and strong nylon base with light pu padding which makes the kappa evo inexpensive without losing on comfort durable or weight shape semi round end use all round learn more with the prologo buying guide features use roadbase nyloncover microfiberpadding light pulength 275x1