The EINHORN mane /neckcover AQUA protects the horse with a cover that contains a breathable, waterproof membrane.
As you can see in the photos, the AQUA cover is only partially sewn, so that the air can circulate in addition to the purpose of a good skin climate. Rain drip off and the horse stays dry.
The Aqua Protection is intended as a second neck part for an occasional use on rainy days. The waterproof, breathable cover is more sensitive and the breathable membrane withstands "scratching attacs" only to a limited extent.