From which age can we use the sling?

Basicaly the sling can be used for newborns up to 30 months (or 18 kg), we learned that newborns not alway liked to go into the water and many moms recomended to use from age of 6 months and up.

Can i use it out of the water as well ?

Sure, we found out , that since the fabrics are light and compact many moms prefer to take it as an extra in the bag when they are not sure they need a sling or whan they have already many things to take with them...
only one thing to pay attention, when the fabrics are compltly dry, it might tend to slip a little frm the ring when wearing for long period.

washing instruction ?

it is best just to rainse in cold water after the pool or the visit at the beach, you can wash the slig in cold water, please do not use bleach and hang to dry.