... moisture and clot due to long-term exposure, so shady, cool and ventilated environment is needed. Cationic Polyacrylamide[Features ... moisture and clot due to long-term exposure, so shady, cool and ventilated environment is needed. Nonionic Polyacrylamide[Features ... moisture and clot due to long-term exposure, so shady, cool and ventilated environment is needed. Zwitterionic Polyacrylamide[Features ...