Low motility

Hubby just got the call with his semen analysis results. They said motility was low. They're looking into who would be the best person to send us too while we build funds to go. In the mean time she said wear boxers and maybe use a cold pack at night. Hubby already wears boxers, and I have no idea what the cold pack is about. But I'm thinking if the shape is fine, and the counts are good, speed sounds like the easiest thing to fix. Advice on increasing motility anyone?