Don't wear heavy clothes, even if you are cold going into work, it may start out chilly but within 15-20 minutes of starting work, you will be asking someone to turn on a fan. Keep a coat with you if your shift goes outside on the cold mornings. But be ready to feel like your working in the middle of a warm spring day if your shift is primarily inside the warehouse. You will be moving A LOT, keep yourself comfortable, stay hydrated and keep yourself safe.