3M Coban2 2 Layer Compression System 2094 (1: 10cm x 3.5m) (2: 10cm x 4.5m), exp 1-2023, 2-2024. Layer 1: 10cm x 3.5m. Layer 2: 10cm x 4.5m. 3M™ Coban™ 2 Layer Compression System is comprised of two thin layers to provide the bulk-free stiffness needed to sustain working or low resting pressures when reducing oedema or treating venous leg ulcers.