Very light and flexible, the cut grooves on the soles provides the necessary ventilation. Cannot comment anti slip properties as i would do not wear them in the shower. However i presume as the friction felt on all surfaces would deem the anti slip should work.The softness does at times make it a little bit awkward to walk around in. but again these slippers were designed for a specific purpose, not all around use. Overall i happy with it. I would give it 4 stars if the soles were manufactured of tougher material to give it a bit stability.