Leatt 4.5 HydraDri Boot - CactusTHE BAD WEATHER SOLUTION All new for 2023 is the Waterproof, Leatt 4. 5 HydraDri boot. Leatt uses a fully waterproof, breathable inner liner to prevent the ingress from water, then seal the top using a tapered neoprene collar. Tested to surpass waterproofness of 20,000 mm+. so what does this mean? Well basically the liner has been tested to withstand heavy rain, and wet snow under high pressure!! With a breathability rating of 20,000. so once again