Work suits can be approved for use both with and without the lifejacket. Work suits that can be used without a lifejacket must be approved as AES suits in accordance with Solas' LSA Code. Anti-Exposure Suit suits are designed to have a minimum of 50mm freeboard when lying in the water. This freeboard is normally achieved in a buoyant insulated suit (neoprene suit or a suit with conventional fabric with an integrated buoyancy liner.) If e.g an inflatable hood is added to the suit a freeboard of minimum 120mm should provided.