UnicornRugs 
Saddle sheets  
2 designs to pick from. 
Our saddle sheets are breathable and lightweight, grip and hold under your saddle.
These are ideal for: 
🦄 Summer months if it's too hot for your horse with normal pad and you find they are sweating.
🦄 under your current pads, to help with airflow and reducing heat under saddle.b
🦄 and the colder months, as a breathable layer to also keep the chill off. 
I've only a limited amount at the moment. There isn't anything I've seen like them on market.
Size is pony or cob/full.