The white blades: These are made using a fibreglass reinforced polythalamide material. What does this mean? Tough. Blades don't wear down, edges don't get ragged. The white blades come with either AMT aluminum or fibreglass shafting. The black blades: These are made using the same polythalamide material as that found in the white blades, only this time it is reinforced with carbon fibres. What does this mean? As with the white blades - tough, but also a little stiffer and lighter. The black blades come with only with carbon shafting. Found standard on all of AquaBound's Recreational and Touring paddles, this unique ferrule features a glass reinforced nylon material. Grooves on the ferrule prevent the build up of sand and sludge, maintaining a tight, trouble- free ferrule for years!