The polyurethane density and compression features provide added durability and help the insole maintain its original thickness and design features even after extended wear

and in some cases

Its expectorant properties allow the riddance of infectious and irritating mucous from the lungs and bronchi

and other discomfort

Bushman Heavy Duty Aerosol 40% Deet 225g INGREDIENTS=Shark Cartilage The polyurethane density and compressionBushman Heavy Duty Aerosols are 'over 200% stronger' than any other aerosol repellent. Outdoor professionals, sports & tradespeople often need a repellent that is super tough & very long lasting. This formula combines the staying power and resilience of Bushman DryGels in an easy to apply spray. Excellent water, sweat, rub resistance insures that no matter how bad the bugs, you will be protected for hours longer than with any other spray on or roll on