porous [Pawr-uh s]
adjective. 1) full of pores or holes 2) allowing passage in and out, penetrable
"Kenya burned over 100 tons of ivory tusks to protest poaching. However, many believe that the burning will not end the killing of elephants because international gangs take advantage of Kenya’s porous borders and corruption to continue the illegal trade."
"The football team is seeking help for inconsistent pass rush and porous secondary through the draft."
"All genre boundaries are porous, and the boundary between horror fiction and literary novels is especially so."