Meg - I've been thinking about buying some cot bumpers lately too as Xander hits his head so hard in the night I actually hear the 'thunk' over the monitor! Reckon they are old enough that the bumpers would be pretty safe? I know SIDS don't recommend them until 12 months, but I don't think they would recommend that Xander doinks his head that hard all the time either! I've looked at the 'ariwrap' ones, but they are way to thin to be of help.