Magnetized fluid consisting of multiple coherent cylindrical fluid parcels. Red arrows show the initial magnetic field morphology. Untwisted fluid parcels are elongated, ℓ_∥ ≫ ℓ_⊥, and their motion is longitudinal along or perpendicular to B₀. In sub-Alfvénic turbulence, the motion of these fluid parcels can be decomposed into two independent velocity components, parallel (black arrows) and perpendicular (orange arrows) to B₀.