Zwei plus zwei is a German based company which is focused on designing, manufacturing and distributing of bicycle trailers under the brand of CROOZER. Croozer are high quality bicycle trailers, which are easy to understand ans easy to use. Quality product that can last, after all it stands the test of time in bicycle culture countries, countries such as Germany. Croozer offers families trailers that are built to last no matter the season, no matter the weather. Croozer now shows a new suspension and dampening system for its child carriers. Croozer is worldwide the only manufacturer who has approved all child carriers according the German TUV Toxproof requirements, that this product is free of any harmful substances.