Dermalogica oil free matte block spf 30 is an invisible oil-free sunscreen that shields your skin from damaging uv sun rays while controlling oil production, giving you a healthy matte finish. Soothing Green Tea. Absorbs oil as it prevents shine without powdery residue. All skin types.Dermalogica oil free matte block spf 30 is an invisible oil-free sunscreen that shields your skin from damaging uv sun rays while controlling oil production, giving you a healthy matte finish. Soothing Green Tea. Absorbs oil as it prevents shine without powdery residue. All skin types.