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Floors in evacuation centers can be very cold especially in winter. These slippers can help to keep your feet warm. [From "How to Craft Safety"]

Materials and equipment: Cardboard, newspaper, duct tape, scissors
How to craft:
1. Cut out a cardboard "T" shape big enough to wrap your foot.
2. Make creases and fold over to cover your instep. Affix with tape.
3. Wrap with newspaper.
Memo: Highly effective in keeping your feet warm indoors (evacuation centers etc...), but do not use outdoors.