These are extremely popular for walking around the ship to warm up your feet. Most ships will ask you to have closed toe shoes at all times.
Indoor/Outdoor Slippers - The North Face
Also a very popular onboard shoe. The dresscode is generally relaxed on expedition so just something warm, cosey and enclosed works on the ship.
Women's Slippers: Indoor-Outdoor & House Slippers | UGG®
Lounging in warm sweat pants is perfectly fine. Generally the vibe onboard is casual unless stated otherwise so picking some comfy warm sweatpants for when your not adventuring is welcome.
Women's Sweatpants - Target
Hoodies are great for warming up after a long day of adventuring. Though they may be quite heavy. Having at least one can be nice at the end of the day
Sweatshirts & Hoodies for Men - Target
Sometimes there are a few formal occasions that you might want to dress up for. I always throw a jumpsuit into my luggage with a few accessories.
