A few tips to identify the travel trolley bag fabric

At present there are many types of trolley bags on the market, according to the material can be divided into two kinds of soft cloth boxes and hard (hard and can be divided into ABS and PP two), according to the structure can be divided into vertical Tie rod and horizontal two kinds of clothes boxes, according to the size to be divided into (from small size to large size): 18 inch '20 inch '22 inch '24 inch '26 inch '28 inch ' 30 inches of these kinds! Commonly used is a 20-inch three-sided and add up to 115CM (except Virgin England is 105CM) can carry the size of the aircraft and the 28-inch three-sided and add up to 158CM aircraft can be checked for free standard size. So how do we identify the travel trolley fabric it?
Natural leather: squeezed with thumbs will have fine lines, leather leather surface is better, good elasticity; and cortical leather have larger wrinkles; if there is no small lines, it is not natural leather .
Goat skin: wavy patterns were arranged, coarse and detailed, stout firmer than sheep, light.
Yellow leather: fine texture expected, irregular pores arranged in dots.
Buffalo leather: more yellow leather pores, skin fibers are also slightly thick.
Pigskin: the surface pattern is usually a group of three pores distribution, the surface is rough, can be soft and hard.
Sheep skin: the pattern was arranged in a semilunar shape, softness, fur is dense, thin skin.