If someone else also like me asks if you Besides writing a travel cot and a travel cot mattress needs: I have now bought both, because I thought you needed both. The travel cot I of Hauck (Play Dream'n Plus), and the mattress / the ground, who is already included, is sufficient as a mattress. Babies are supposed to "relatively" hard lie, no way to soft (spinal injuries, sudden infant death syndrome). Nevertheless, I personally find the additional travel cot mattress well and regret not buying (including less than 20 EUR. Shipping). For weekend trips infant bed is enough pure, but to a 2-3wöchige trip I would still prefer to have this mattress there. So, I do not know whether the now further help 100%, but maybe it will help in making decisions ... Enjoy!