The Texas Recreation Wet Sweat® Hydro Therapy Belt is a buoyant, blue water exercise aid designed for water aerobics, aqua jogging, and rehabilitation. Made in the USA with a durable vinyl-coated foam, it features an adjustable buckle for secure, comfortable fit in the pool. 
Watercrafters

Sizes: Available in S/M (26-34") and L/XL (34-44").
Purpose: Enhances buoyancy and eases movement for water therapy or fitness training.
Key Features: Often part of a combo set including "Wet Bells" for added resistance.
Material: Usually constructed from soft, vinyl-coated, or neoprene-style foam.
Commonly used to improve stability in water, this belt helps maintain vertical posture without tilting.