Sweat & Summer Blankets Best suited for work when the horse has become sweaty. They remove moisture from the body and make the horse dry faster afterwards. A wet, sweaty horse can suffer from both colic and cruciate ligament if you just leave it "naked" or even put it on the outdoor blanket directly on the wet fur. The sweat blanket is therefore a must in the horse's wardrobe if it has an active life with a lot of training and competition if you want to keep it healthy and well.