Hydrocolloid Roll for Wound Care, Cut-to-Size, Extra Large 2in x 16ft Hydrocolloid Patch Bandages with Self-Adhesive, Ultra Absorbent, Flexible & Waterproof, Wound Healing, First Aid Kit Essential. Waterproof, Breathable and Safe: The hydrocolloid bandage promotes air circulation while maintaining its waterproof performance, effectively protecting the wound from external contaminants.