Care of Blue Cloth Helmets

[DanielLynch]

Hello everyone,
Having recently inherited four Victorian Home Service helmets and so far being familiar only with storing and preserving steel helmets, I was curious if forum members have any suggestions on how best to store and preserve these helmets? They are presently being kept in a display cabinet with glass doors in a finished basement room with proper insulation. Humidity tends to be around 50% RH. Any recommendations on whether to treat the cloth with insect repellent or how best to make sure insects stay away? I’ve never had any issues with the steel helmets and caps being kept in the same room. Unfortunately, none of the helmets bar one came with their carrying tins. Thank you!