The smooth poly plastic exterior is strong and durable to resist sagging and odors even at max capacity. The oversized absorbent core is the most absorbent at NorthShore & compares to other brands with ISO max absorbency of 6500ml. The extra-large core also provides excellent coverage in the front and rear even for side sleepers. MEGAMAX USA Briefs, 40PK With a near limitless absorbency and quick wicking core, NorthShore MegaMax Briefs are the total package when it comes to protection.