Hello Kour
The Saver Day Pass is valid for unlimited travel on the selected day and until 5 AM the following day. It is worth the money given the single or return fare is higher than the actual cost for the Saver Day Pass.
Carefully selected the correct pass: there is a half and full fare Saver Day Pass for each class, 1st or 2nd.
If you tell us the day for which you want to buy the pass, we can double-check the cost at our end. Please indicate if you will have the Swiss Half Fare Card or not, as well as the desired travel class.
Note: it might be a good idea to check the advantages of the Swiss Half Fare Card as it offers discounted tickets for the railways and cable cars in Zermatt, too. In order to know if the Swiss Half Fare Card is worth the money, sum up all travel costs of your entire trip. If the total amount exceeds CHF 240, the Swiss Half Fare Card is a good investment.
https://www.myswitzerland.com/en-ch/planning/transport-accommodation/tickets-public-transport/swiss-half-fare-card/
Best regards,
Roland