The "Ultra~" fabric is made by laminating a waterproof 200psi "RUV™ film" on the back of "UltraWeave" , a woven fabric made from a blend of high-strength polyethylene fiber (UHMWPE) and fully recycled high-strength polyester. In other words, it is a two-layer fabric with an outer layer (first layer) and an inner layer (second layer). There are different lineups depending on the thickness, such as 50, 100, 200, 400, and 800 denier, but "OGAWAND" uses "Ultra 200x", which is the most balanced fabric for lightweight backpacks. It is not too light to touch, but it is not clumsy either, and has a "just right lightness".

The outer fabric, UltraWeave , is a material that has just the right amount of flexibility while also being extremely strong, abrasion-resistant, and lightweight. By attaching a sheet-like film with a grid pattern similar to X-Pac, called Ultra-PE CrossPly, to the back of the fabric, it creates moderate rigidity and strong waterproofness. (Waterproofness of 200 psi is about 140,000 mm in terms of water pressure resistance!) Normally, to increase waterproofness, a thicker film needs to be sandwiched between the fabric or a coating needs to be applied, which makes the fabric itself stiff and difficult to handle, and tends to increase the weight. The woven properties of UltraWeave work well with such sheet-like films, and Ultra200x weighs 3.9 oz/yd², which is about 20 to 30% lighter than previous fabrics. In addition, many of the fibers and films are made from recycled PET bottles, contributing to environmental friendliness. Although we mentioned earlier that this fabric is "two-layer," it could be said that it is a single piece of highly functional fabric that combines complex elements .