A Europe rail trip is the couple rail journey for a week. One person lifts a 35 L suitcase-style pack onto the rack. The other keeps a daypack, the passes, and the water. Sockets change when the country changes, so the adapter is a printed diagram, not a guess.
The picks below are gear already filed on the Two seats, two rack lifts journey. Each line says why we picked it for this trip.
Keep Allpa 35. Add Isolate for the wash bag.
The kit
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Why we picked it Train racks punish a heavy lift. Cotopaxi lists 35 L, 22 x 12 x 10 in, and about 2 lb 15 oz, with a suitcase-style opening for the hotel at the end of the line.
Why we picked it European sockets change by country. This is a grounded universal slider with USB ports. Read the max current printed on the SKU before a high-watt laptop.
Why we picked it A long segment outlasts a phone. Copy the watt-hour figure on the label. Spare batteries sit under the airline Wh rule, commonly 100 Wh without approval.
Why we picked it The flight into Europe still has a liquids tray, and the hotel sink is not a place for an open bottle. Locking tubes come in 50 ml, 75 ml, and 100 ml.
Why we picked it Station rain is a shell problem. Columbia lists a packable Omni-Tech jacket with a pocket stuff-sack, so it does not become a second bag.