MUST be booked at least 3 days before travel, but not tied to a specific train. Only use of the BeNeLux trains via Roosendaal or the belgian locals via Liege-Maastricht, thus not Thalys. Not before 9.00 mo-fr. Till late july-as there will be big repair works on the Moerdijk bridge in the route and thus no through trains from around 1/8 for 2-3 weeks. valid 1 day only, breaks along the route allowed.
can also book on b-europe for trips starting in NL, for foreign friends this is the better option due to less probs with payments CrCds and all that. Home print necessary!
For juniors<27: as usual, NMBS=Belgian railways also offers the Go_Unlimited Railpass 12//25 eur for 1 week//month, valid till last station before border (any direction), during july/august. For first use a MoBiB chipcard must be paid for-5 eur, valid 5 years, on which it is loaded.