style 1: black (first layer cowhide)(款一：黑色（头层牛皮）) style 2: black (two-layer cowhide)(款二：黑色（二层牛皮）) style 3: black (pu leather)(款三：黑色（PU皮）) style 4: black (two-layer cowhide)(款四：黑色（二层牛皮）) style 4: brown (two layers of cowhide)(款四：棕色（二层牛皮）) model 5: black (second layer cowhide)(款五：黑色（二层牛皮）) model 5: gray (two-layer cowhide)(款五：灰色（二层牛皮）) section 5: brown (two-layer cowhide)(款五：棕色（二层牛皮）)

38(38) 39(39) 40(40) 41(41) 42(42) 43(43) 44(44)