Download the sports direct app and buy from there as there is a code for 20% off if you order through the app. I just bought DD a waterproof jacket, water proof trousers, fleece and body warmer from there last week for her cub camp. Came to about £40 + delivery.
Goretex is the non sweaty material or Isotex etc. That will cost more but is there any chance she might be able to use this for a few years? Ebay might be your friend for a better quality but 2nd hand if you don't think she will get any wear.