Scotland coach Matt Williams has named a 25-man squad to take part in next week's training camp.
The players will attend the pre-Christmas camp at Stobo Castle from Monday to Wednesday.
Five other players have been invited take part in certain aspects of the camp but will not attend the full event.
They are Edinburgh Rugby trio Scott Murray, Simon Taylor and Tom Philip and Scott Gray and Stuart Moffat of the Borders.
Forwards: R Beattie (Gwent Dragons), G Bulloch (Glasgow Rugby), B Douglas (The Borders), S Grimes (Newcastle Falcons), C Hamilton (Newcastle Falcons), N Hines (Edinburgh Rugby), A Hogg (Edinburgh Rugby), A Jacobsen (Edinburgh Rugby), G Kerr (Leeds Tykes), D Macfadyen (Glasgow Rugby), S MacLeod (The Borders), J Petrie (Glasgow Rugby), R Russell (London Irish), T Smith (Northampton Saints), J White (Sale Sharks)
Backs: M Blair (Edinburgh Rugby), C Cusiter (The Borders), A Henderson (Glasgow Rugby), B Hinshelwood (Worcester), S Lamont (Glasgow Rugby), G Morrison (Glasgow Rugby), D Parks (Glasgow Rugby), C Paterson (Edinburgh Rugby), G Ross (Leeds Tykes), H Southwell (Edinburgh Rugby).
As head coach Stuart Lancaster polishes the axe he will soon wield over his World Cup training squad, Exeter Chiefs coach Rob Baxter has backed Jack Nowell, Henry Slade and Luke Cowan-Dickie to be given a stay of execution.
Italy Under-20s held off a late Samoa blitz to retain their place in the World Rugby U20 Championship on Saturday and head coach Alessandro Troncon believes the experience will have served as a valuable lesson for his young troops.