A rolag (Scottish Gaelic: roileag) is a roll of fibre generally used to spin woollen yarn. A rolag is created by first carding the fibre, using handcards, and then by gently rolling the fibre off the cards. If properly prepared, a rolag will be uniform in width, distributing the fibres evenly. The word derives from the Scottish Gaelic word for a small roll. 
- Hoke, Alexa and Terry Brandt. "Through the Wool Cards", Bittersweet Volume II, No. 4, Summer 1975.