The invention relates to a material comprising a web wherein said web comprises at least one surface layer comprising polyether polymeric antistat, extrudable polymer, and compatibilizer wherein said surface layer has a roughness of greater than 0. The composition exhibits optimum controllability of radiation transmittance as a chemically amplified positive-tone resist effectively responding to active radiation, particularly to deep ultraviolet rays, effectively controlling line width variation in resist patterns due to fluctuation in the resist film thickness on a highly refractive substrate, and exhibiting excellent focal depth allowance. The seat is reclinable into a bed configuration such that the seat portion is moved forwardly out of the open end of the shell.