The Spear Pro weight belt is made out of a mixture of materials that allow for the perfect amount of stretch (not too little, not too much) and also for a long life. Most belts in the market are either made of materials that do not flex or are made of pure latex that stretches too much and goes bad within a year.This belt is 3mm thick and can be loaded with up to 15lb of weight.The belt comes in various color combinations.