[emma_teddy]

as serenditpity said, anything branded as "cotton" is a no-go for hamsters. if they swallow it it can get wrapped around their digestive track or oesophagus or something (because cotton has long fibers) which can cause serious harm or death to your hamster.

i used carefresh for a while, but as you said it is more expensive so i recently switched to kaytee clean&cozy and like it much better. i'm not sure if you have that in the Netherlands though. Aspen bedding is also good, just make sure it isn't pine/fir.