Dr. G breaks down the Unna boot: its origin, ingredients (zinc oxide, glycerin, gelatin), and how its semi‑rigid, inelastic compression helps venous stasis ulcers. He compares Unna boots to modern multi‑layer systems, explains the pressure mechanics and therapeutic targets, and highlights practical application tips.

Key cautions are emphasized: always assess vascular status/ABI before compressing, avoid use with critical arterial disease, heavy drainage, active infection, non‑ambulatory patients, or purely neuropathic plantar ulcers. Compression must be individualized and combined with correct diagnosis and overall wound care.