Yeah, you can get a Bedroll in Garib Rath and Duronto trains if you pay extra, like around 25 to 30 bucks. Just make sure you choose the Bedroll option when you book your tickets.
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In Garib Rath, bedding isn't included by default. But don't worry, you can still get it if you pay extra.
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You have two options. Either add the bedding when you book your tickets (they'll charge you for it) on IRCTC.
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Or, if you didn't get it in advance, you can buy the bedding from the train attendant during the journey, as long as they have some available.
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Usually, a bedding set will include a pillow, a blanket, two bedsheets, and sometimes a towel.

Haan, Garib Rath aur Duronto train mein Bedroll mil sakta hai agar aap kuch extra paisa kharch karke 25 ₹ - 30 ₹ har set ke liye de do. Aapko ticket book karte samay Bedroll ka option choose karna hoga.
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Garib Rath reservation mein by default Bedding included nahi hota hai. Bedding payment ke against available hai.
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Ticket book karte samay isko book kar sakte ho (uska cost ticket mein add ho jayega) IRCTC se.
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Ya phir safar ke dauraan, Attendant se bedding cash payment par availability ke hisab se le sakte ho.
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Typical bedding set mein 1 pillow, 1 blanket, 2 bedsheets hoti hai, kabhi kabhi ek napkin towel ke saath.

I didn't know this, but can I book a bedroll after booking the train ticket?