These are cylindrical pieces of flexible, buoyant polyethylene foam used for various water activities.
Purpose: They are useful when learning to swim, for floating, for rescue reaching, in water play, and for aquatic exercise. They provide excellent buoyancy support, helping people stay afloat as they build confidence in the water.
Material: They are typically crafted from non-toxic, durable EPE foam.
Other items: The image also shows a black punching bag with the brand "Lucky SHIA" written on it and a blue broom/mop handle leaning against a shelf.