Twinstone fur felts will be okay if they get wet but wool felts and straw hats will have a harder time in the rain. None of the hats will be destroyed unless it has prolonged exposure to the rain. Wool and straw hats should be kept away from rain as much as possible. Felts:
If a felt becomes wet, turn down the sweat band and use it to stand the hat on a flat surface. If your sweat band is too wet to do this, place the hat on a hat base. Leave the hat to dry naturally until completely dry. Depending on how wet the felt got, this could take several days. DO NOT USE HEAT. Do not brush off any mud on the hat until it has dried on its own to avoid getting it in deeper in the fur. Once the hat has completely dried, you may use a felt sponge to gently brush counter-clockwise from the back of the hat to remove the excess dirt or dried mud. Staw Hats:
If a straw hat gets wet, first dry off the excess water with a dry cloth by gently pressing and lifting the cloth. Try to avoid rubbing the cloth along the wet surface. Depending on how long it has been exposed to the rain the hat could stain more by rubbing. Like with a felt, turn down the sweat band and clean the surface gently. Hopefully, your straw hat was not exposed to too much water and did not permanently stain.