This is an incredibly rare pro issued TT race suit from Team EF when they did their collab with Palace.
Size small, it fits very tight (as it’s supposed to).
The suit features a double layer in the upper body (like a built in base layer), has a rear pocket for race numbers and also a radio pocket.
These suits were never made available to the public (this suit was for Hugh Carthy)
This is very similar to Rapha’s current Pro Team TT Aero suit that retails for $600.