This may not be relevant because I mainly use coolers when bringing them in wet/muddy/cold..., or after hosing/bathing if it's not sunny and warm.
I have a couple of old wool coolers that are flat. One is very heavy and dense, the size of a king size bed blanket and has an interesting buckle.
The buckle side is close to the edge, while the strap side is set in about a foot (12"). When fastened it stays fairly well up high on the neck. The buckle is the only fastener on it.
Elwood is sporting it in the pics, the striped one.
The other lighter Dress Campbell plaid one is on the mare Solo, in the background. It is lighter, softer and lays closer to the horse, may do a bit better at drying because of this. It has ties in the front and a butt cord for behind the tail.
You can see that both sides of the ties are at the edge. So it gapes, slides, and has to be tied to the halter to stay up. Someday I may move one tie over. Need another horse to be motivated though I think. HaHa.
The mare, Solo, didn't need it tied at all though. She walked around like the Queen of Sheba loving every minute with it, teeny little steps, careful not to let it slip. wool coolers 004.jpg wool coolers 005.jpg wool coolers 006.jpg wool coolers 008.jpg
Note to self: You do not need another horse. You do not need another horse.....