1. This excellent quality lifebuoys are made with the cork, foam and other lightweight materials in smaller proportion.
2. High temperature resistance, no shrinkage, cracking, swelling and decomposition.
3. Fire resistance, not easy to be burnt and melted after burning.
4. The iron can bear 14.5kg in fresh water for 24h.
5. In the case of free-hanging, it can withstand 90kg for continuous 30min, without cracking and damage.