I live in Florida so heat can be a problem. I bought a couple battery operated small fans. They clip to my wheelchair seat sling and can be aimed for best cooling. They are powered by 2 AA batteries. I use rechargables so low cost. I keep one in the house and one in the car for my 'traveling' wheelchair. The product is 'O2 Cool #1261CTR Flexi Clip Fan' and cost about $5 each. They are availbale at Amazon and other vendors. Just Google the product.