Langzisporting Authentic L-903 Follow-up Worm Aviation Air Nozzle Type Aviation Air Nozzle Type Wild Swimming Essential Drifting Bag 10L

The difference between the third and fourth generations:

The first generation: The fourth generation uses high-density nylon fabric with PVC or TPU waterproof technology, which is characterized by wear resistance, scratch resistance, and softness.

The second: The fourth generation uses large-flow aviation air nozzles for air filling, which is convenient and allows the airbag to be inflated at any time.

The third: The fourth generation adopts a square shape in structure, with ropes passing through all four sides, which is convenient for rescue and more conducive to safety.

The product design includes a dual airbag system.

Each blow half, can not be full.

Factory testing for 3 hours without leakage.

For example:

A normal adult needs 3KG to 4.8KG of buoyancy to keep their head above water when breathing.

The buoyancy of Langzi products is usually 8KG to 12KG.

Specific product buoyancy as described.

Specific gravity of water: 1.0 (g/cm3). Blood volume is 7 to 8%. Fat specific gravity: 0.9 (g/cm3)

Muscle accounts for 46% of body weight, bone accounts for 20% of body weight, and the average human body weight is about 0.98 (g/cm3).

Fat accounts for 13% of body weight. Human body water content: 70%. Sea water specific gravity: 1.022-1.023 (g/cm³).