Thermobaby Mediterranean natural sponge comes from the Mediterranean Sea, it is much more durable than vegetable sponges. It is also much softer, more absorbent and more hygienic than a synthetic sponge. The sponge returns to its original shape a few seconds after use. Ideal for sensitive baby skin. Hypoallergenic, does not irritate the skin, improves blood circulation. Each bathing will be a special moment for the baby. Dermatologically tested. 100% natural biodegradable material.