Help. What to do with hair?!?!

An

My husband has really long brown curly hair and it looks so nice when he gets out the shower but when it drys it gets really puffy. I really want his hair to be loose formg maternity pics... what can i do to his hair please ?? This is his hair after he washed it and i detangled it ... it looks nice cuz its wet but its going to dry up.. especially since our pictures will be outdoors helpp me lol