Carex oxygen supplies are designed with high-quality materials at a friendly price point. Prolonged use of cannulas can cause irritation or chafing over time. The Carex EarMates make using cannulas much more comfortable with soft foam cushioning the cannula from contacting the skin. For the best in comfort, buy Carex oxygen supplies. Soft foam cannula ear protectors; Prevents irritation and makes cannula use more comfortable; This item may be eligible for FSA and HSA reimbursement.