I'd stay away from any fully enclosed hide for safety's sake. I prefer the lighter hides anyways (like the Exo-Terra reptile caves and the RBI hides). Some of my snakes are getting too big for the RBI hide entrance, so they just lift the whole thing up when they go inside and let it come down over them. The only downside to the lighter hides is that "hermit-crabbing." The BPs seem to figure out they can take their hide with them and will move it all over the place.