Quick Answer
Guildrun Hasty Vest is an event item whose official Demo 0.5.5 update increased Shields applied from 250 to 300. It is a useful defensive choice when the holder or team needs a larger Shield window, but the public patch note does not publish the full trigger wording or every holder interaction. Treat the confirmed 250-to-300 change as versioned evidence and mark the rest To be confirmed.
Choose Hasty Vest when a Shield prevents the next meaningful hit or keeps a frontline active long enough to cast. Do not pick it automatically when the team is losing to damage that Shields cannot address.
The 0.5.5 Update
The official patch raises Hasty Vest's Shields applied from 250 to 300. That is a direct buff to the item’s confirmed defensive output. It does not prove that the vest is the best event choice for every build, because the value depends on timing, target, and the rest of the defensive package.
Older pages may still show 250. Keep the version label beside the number so the reader can distinguish an old screenshot from the current Demo 0.5.6 state.
Choosing the Holder
A frontline hero such as Skorn is an obvious comparison because Skorn's Haughty route also received a Shield improvement in Demo 0.5.5. That is a useful synergy to test, not an official best-in-slot rule. A backline hero may also want the vest if one opening hit is the reason the active ability never happens.
Read the Skorn The Haughty guide and Guildrun Skorn guide for the tank context. Exact holder rankings and item stacking rules are To be confirmed.
Shields and Stall
Hasty Vest is most valuable when Shields bridge the team to a later trigger such as Stall, a cast, or a damage cycle. If the board has no way to survive after the Shield disappears, the item may only delay the loss. Pairing it with a coherent frontline and a clear carry plan is more important than the item name.
The Guildrun relics guide explains how to judge defensive relics and items by the problem they solve. Do not treat every Shield effect as interchangeable; the exact duration, target, and trigger of Hasty Vest are not fully documented in the public patch note.
Event Timing
The official update groups Hasty Vest with items from The Altar, The Fallen Beast, and The Abandoned Camp. It does not provide the full event selection table or appearance odds. Those details are To be confirmed.
When the item appears, compare it with the next encounter. A 300-Shield improvement is most valuable before a fight that would otherwise break the tank or interrupt the team's engine. If the board is already safe, a damage or economy choice may create more progress.
Red Rift and Endless
In Red Rift, Hasty Vest can be attractive when the next fight is an opening-survival check. In Endless, the item may help a long-lived tank reach repeated casts or Stall, but later floors can make damage and control more important. The official material does not publish a current mode ranking.
Use the Endless guide and patch notes for mode and version context. Any exact floor recommendation remains To be confirmed.
Current Verdict
Guildrun Hasty Vest currently applies 300 Shields, up from 250 in Demo 0.5.5. Choose it when a larger Shield window solves the next fight's survival or casting problem, and keep the full trigger, duration, holder ranking, and event table labelled To be confirmed.