perfectly comfortable for brushing but a loose fit on the brush [SEP] these brush heads are perfectly average in terms of design and comfort they presented no difficulties with brushing whatsoever and were comfortable to usemy big problem was they they did not seat firmly onto the brushs metal attachment and thus fell off several times during my brushing session the information on this page clearly indicates that they are compatible with all emphasis theirs oral b electrich toothbrushes with the exception of sonic models which i do not have i have the oral b deep sweep as such i cannot really recommend them they will brush your teeth but only if you are comfortable catching it in your hand every seconds or so