P roperties Comfort High heat of wetting: lots of polar groups available High water absorption: up to 1/3 of its weight Smooth and soft High luster: high crystallinity and triangular croSs-sectional shape Scroop: rustling sound due to an acid treatment that hardens fiber surfaceProperties Comfort High heat of wetting: lots of polar groups available High water absorption: up to 1/3 of its weight Smooth and soft High luster: high crystallinity and triangular cross-sectional shape. Scroop: rustling sound due to an acid treatment that hardens fiber surface