They have no denim material at all, just stretch leggings material. The "cracks in the material" are actually printed or painted onto the material, which looks very tacky. They are also very small.
Slaixiu Leggings Fleece Printing GP777 3P B 130 Girls' Clothing and Leggings
54 Review
Kid Nation Unisex Heather Charcoal Girls' Clothing for Leggings
52 Review
ZukoCert Fleece Leggings Cashmere 2P B 130 Girls' Clothing for Leggings
61 Review
Girls' Clothing and Leggings - Govc Winter Fleece Velvet Leggings
49 Review