equafleece - water proof and beathable and fits well - also have tail flap with replective on which i think really helps (may not be in pics on website as its a more recent addition to the design)
Yes can second the above suggestion re. the equafleece one. The ONLY thing I have found against it is that if you've just clipped, the fleece will tend to pull against the nap of the horse's coat as it moves and can be irritating (think....... pair of knickers that pull into all the wrong places...... get the meaning)
But you can ask them to line it for you which will solve the problem. Also if you rip it they will repair it.
If you want one with a reflective tail-flap you can select this as an option; they really DO cover the tail and are worth the extra.
I'm a great fan of their stuff; good stuff made here in the Westcountry by people who know what the elements can throw; its well made, lasts well and does what it says on the tin. Not the cheapest, no, but well worth it IMO. Some nice doggy jackets too!