Via [url=https://steamcommunity.com/games/CSGO/announcements/detail/529842339955345113]the Steam Community[/url]:

[quote=Valve][b]WEEKLY CARE PACKAGE[/b]
- Added three all-new weapon collections to the Weekly Care Package drop list: Ascent, Boreal, and Radiant
- Removed four weapon collections from the Weekly Care Package drop list: Bank, Italy, Lake, and the original Train collection

[b]ARMORY[/b]
- Added new Armory Content:
- The Train 2025 Collection
- The Fever Case
- A new Limited Edition Item: the XM1014 | Solitude

[b]MAPS[/b]
[b][u]Inferno[/u][/b]
- Adjusted Banana to more closely match the size of the CS:GO version
- Simplified background behind T ramp
- Simplified view into Pit
- Simplified background of Bombsite B
- Removed step on sides of Arch hallway
- Removed pixel gap at Coffin
- Adjusted crates on steps up to balcony so players step up reliably
- Adjusted or removed props throughout map
- Adjusted Player and Grenade collision throughout map

[b][u]Train[/u][/b]
- Fixed a bug where player shadows would render through windows above A main
- Fixed some holes in the world
- Simplified back wall by door to Z
- Simplified background by upper B entrance
- Shortened overhead roof rail in A site, to make it easier to throw utility into site
- Replaced see-through grating on catwalk outside of Z door
- Replaced see-through fences at top if Ivy with solid version
- Simplified brick wall by Ivy
- Fixed grenade collision on upper B arch[/quote]

Rumor has it:

- Size is ~2 GB (with Workshop Tools installed) - **data capped users should take action now**