UltrAspire Isomeric Race 20 oz.
Here's what other sites are saying:
The ultimate minimalist handheld from UltrAspire! When water is the only necessity and every ounce counts, breathable mesh adjustable hand attachment piece with soft-bound perimeter for carrying a bottle, wiping your face, and nothing else. Simple efficiency in an elegant solution. 20 oz InSpirAtion Human bottle included. When you want to go for a new personal best.