We suggest buying at least two pair of sand socks. They tend to get sweat then wet from the feet staying very warm from the slipper socks.

Most of your body heat escapes out your Noggin. Wearing a hat is amazing, it will keep all our players nice and toasty.
I would suggest a couple hats for practice in case one gets sweaty.

Fingerless gloves so your player can hand set if needed.
I like the fingerless gloves that turn into mittens so if I don't need to set or I am hanging out not playing... I can keep my finger tips warm.

My thoughts are, you can never have enough slippers socks for playing.
They keep the feet so warm that your feet will get sweaty. From the wetness of the sweat, your feet will become cold.
We are always swapping out our socks in between games and drills to make sure our feet stay warm.

I like to have serveral layers on so I can peel off the unnessary layers as I get warmed up.
Then put them back on as playing slows down.