我老公(F1)和他们一起去,需要重新签证入境
if less than 30 days from Canada, his F-1 D/S I-94 plus related proof (such as I-20) should be enough to reenter US.
if less than 30 days from Canada, his F-1 D/S I-94 plus related proof (such as I-20) should be enough to reenter US.