The main body material is made of master-piece original fabric "MASTERTEX-09?, which is both durable, water resistant and water repellent.

This fabric is woven using two twisted Hollofil Air? (66 nylon hollow yarn) made from two twisted Hollofil Air? (66 nylon hollow yarn) made from INVISTA's certified factory that meets the quality standards of CORDURA? brand fabric, and is woven using two twisted Hollofil Air? (66 nylon hollow yarn) with 840d warp and 420d weft threads, and is a fabric with strength against friction, tear, wear, etc.

The back is coated with PU and laminated with L-VENT?, a special breathable waterproof film, further improving water resistance, and has a three-layer structure made of tricot nylon bonded together.

The attached materials are made of two types of leather and fabric, and the leather used for the front face is made of water-repellent velour leather by tanning it with oil and tanning it.

Since there is no silver layer, it is not only breathable, but it is also thick and firm. It features a unique, warm surface with pile.

The leather used in other parts is carefully selected from high-quality domestic steer leather, and during the tanning stage, a waterproofing agent made by 3M is placed in the drum to allow it to penetrate into the leather.

After that, the base is dyed and oiled to create a base, and the finished stage is sprayed with a waterproofing agent made by the company, further improving waterproofness.

This is waterproof and stain-resistant leather that has passed the monitoring test of 3M's "SCOTCHGARD?". The test is performed even if the surface is shaved, so the effect will not be reduced.

The material on the bottom and other surfaces is made of INVISTA's 1680d Cordura Ballitec? nylon, which has about five times the wear, tear strength and durability that is usually nylon, and PVC processing is applied to the back to improve its strength and waterproofness.

The cushions on the shoulder pads, which have a five-layer structure except for the outer material, are made of EVA resin, which is very light and resilient, and Asahi Kasei Advanced Fusion?, which is also used in bedding and car seats.

Fusion? is a groundbreaking three-dimensional knit made by Asahi Kasei, which has excellent cushioning properties, where two knitted fabrics are connected with elastic yarn. The combination of the muscular structure makes it highly morphologically stable.

The closest part to the body is made of Outlast?, a temperature control material developed for NASA, and a fine, soft double russell mesh.

Furthermore, the backpack is equipped with an original mechanism called "m-strap 2" that reduces the load applied to the body. Not only is it cushioned, but it also fits the shoulders of a variety of people, making it comfortable to use.

The storage surface also comes with a variety of pockets for ease of use, both inside and outside, whether large or small or on and off the shelf.