Waterproof backpack RUCKSACK

multi-usewatersports

Watertight rucksack, made of rubberized fabric of neoprene-hypalon, high resistance (CR>=4200N/5cm) watertight zipper for air and water watertight rucksack can be inflated with air for the buoyancy and protection from from hits and crashs, or it can be totally empty of air for protection from oxidation of salt it is equipped of nautical type valve with a double functions: for inflation and/or intake valve of inside air, for the protection of objects and to allow the landing of swimming totally secure minimal amount of space when it is deflated for diving to tranship your electronic devices such as tablet, laptop, camera, mobile phone etc.. on the beach during the swimming its function of life-preserver to reach boats it does not require a air-blower, to make it empty or filled with air, you can press rucksack keeping open valve or open zipper customizable on demand A product derived from the backpacks and sacks used for decades in professional sectors. It's a versions adapted for daily usage. since 2013-2014 years prototyping phases for marine and professional activity, quality and savety of product: testing 2015 year, new model summer 2023