Freediving schools, instructors and top freedivers usually use large buoy because it has several advantage compare to smaller size of buoy. 

The bouy has been designed and recommended by Jean-Pol Francois, the AIDA Education officer and AIDA Instructor Trainer with 25 years of experience in teaching freediving. 

Our Freediving buoy has an internal volume between 60-70 liters, and depending on the pressure and the type of inner tube used it will be up to 16l. This huge volume will give good buoyancy for more comfort, and more space for storage inside.  
The internal storage could hold up to 100m rope of a 10 to 12 mm (depend on the type of rope and inner tube). 
Buoy cover is made of High density Nylon polyester fabric coated with PVC and the yellow color can be easily spotted for more safety. Water repellent, it will quickly dry. It has two quality plastic zippers. One give access to the internal storage in the middle of the buoy, and the second one give access to a side pocket where small object can be stored. 
The 6 Big straps on the side serve as a handle for diving freedivers.
Large Pocket with Zipper to store you small accessories when you are out in the water.
The bottom of the buoy is made with a strong mesh for a fast drain. A large and strong stainless steel D-ring is strongly sewed to the mesh and are use for the carabiner. 
Size is : 720 mm * 200 mm
Volume of storage with inflated tube inside: 16l

OPTION 1: 
Buoy cover only. 

OPTION 2: 
Buoy cover and Inner tube Package. The inner tube is the same as for car.

Made in Korea
Weight : less than 1 kg