From the seller

Zoggs Kids Back Float Buoyancy Aid Perfect for toddlers and young children learning how to swim independently! Age: 2-6 years however can be used for upto 9 years with weight capping of 25kg. This premium float helps maintain the correct body posture in the water while keeping their arms and legs free to practice strokes. • Condition: Excellent, pre-owned condition. Cleaned, thoroughly sanitized, and ready for a new home. Extremely light weight with no discomfort to the back. Features: Made of heavy-duty, high-density EVA foam. Features multiple removable float layers so you can slowly reduce buoyancy as your little one grows more confident in the pool. Outfitted with a secure double-action safety buckle so kids can't accidentally unclip it themselves.