In line with SOLAS Convention and MSC and other relevant regulations, suitable for ocean ships, cruise ships, ice rescue, etc. The insulation suit is made of neoprene cloth and watertight metal zipper. The wearer stays in 0-2 degree water for 6 hours to maintain a temperature drop of no more than 2 degrees. CCS Marine product certificate is available.the thermal insulation garment must be tested after one year. The test can be sent to the manufacturer or the manufacturer's authorized testing unit.