the 100% waterproof and ultra-durable Tropical waterproof backpack is the perfect companion!

Referred to as semi-dry due to its excellent insulating properties. 

Referred to as semi-dry due to its excellent insulation properties. 

The Nuvair Pro O2 Handheld Analyzer measures oxygen levels in mixed gases from 1% to 100% oxygen. It comes with a water- and impact-resistant case and is available in three power options: Wall plug-in, 9-volt or rechargeable lithium battery.