Apnea Atollo bag without an inner tube.

Freediving schools and experienced freedivers will surely appreciate this article.
These atolls are made of PVC coated polyester fabric, which is waterproof and highly durable. The internal volume varies from 45 to 70 liters depending on the size chosen. Therefore, buoyancy is very high. With this atoll, the following are eliminated

The small straps around the buoy are designed to hang the snorkel. The large straps, on the other hand, serve as a handle for freedivers before the dive.

It is possible to mount a flag for better indication of the dive site.

Standard atoll size: 600mm diameter / 200mm high.
Atoll Size Large: 700mm diameter / 230mm high.

Internal storage volume: 10 liters for the Standard version and 16 liters for the Large version.