3" Primer Modified Unna Boot Dressing (10 yards) and Co-Press Self-adherent Bandage (5 yards). Primer Unna-Pak is a convenient system containing two high performance bandages that together form a two-layer unna boot. The primary bandage (a moist foundation layer) is the Primer Modified Unna Boot Dressing. The secondary dressing (a compression layer) is the Co-Press Self-adherent bandage. Lightweight, yet strong and easy to apply. Beige.