I own the Mt. Hardwear Chillwave and am 151 pounds and 5 ft. 10 inches. I am comfortable in Size Large. That said, I am quite certain that size Extra Large would be the correct size for your husband.
While his height would indicate a size Large, I think that at 220 pounds he would find the size Large a bit too tight. So I recommend the size XL. I hope this helps!

I'm 6'3 and 220 pounds and I have an XL and it fits perfectly. I think that the XL might be a bit longer in the arms than required but it has velcro cuffs to deal with that. The L would be too small most likely!