With this Happy by Lies car tensioner, you can complete your pram or maxicosi. My car tensioners have a unique and hip design and are handmade. The car tensioners are made of unprocessed beech wood beads and crocheted themselves with beautiful cotton wool. All car tensioners provide a subtle sound during a walk or car ride. * approved bpa free silicone beads * 100% cotton crocheted wooden beads * beech wood rings for a fun sound * Untreated beech wood beads *The car tensioners can also be assembled entirely by yourself