Previously known as the Fento 400. The Fento MAX F280440 is the\n big brother of the FENTO ORIGINAL, the longer length offers extra \nprotection and ergonomics. The Ergonomic Wedge ensures the correct \ndistribution of pressure across the lower leg, which prevents knee and \nback complaints. It has an improved fit which takes on the shape of your\n own knee after a while and thus offers even greater comfort, \nflexibility and ergonomics. The FENTO MAX is exceptionally \nwear-resistant and has a broad, flat surface for extra stability. In \naddition, this product has a replaceable inlay for\n when it needs to be replaced (the support offered by the inlay reduces \nafter repeated use) so you need not buy a completely new knee protector.\n The product is waterproof except for the inlay; it consists of a \ncombination of both breathable and waterproof materials. This knee \nprotector weighs just 500 grams. The wide elastic straps do not pinch \nbehind the knee.