Skin-friendly Liner The liner is thickened, soft and breathable, well absorb shock, also creats a sock like fit. Trimmable Insole The insoles included are designed to be easily trimmable to fit 4 different sizes, specially adapted to the adjustable skates, provide comfortable support..with led wheels..comes with wrench’s to tighten the wheels and dino tattoos..these are adjustable to fit size 1-4 in kids size..you push the button on the side and adjust it..very thick insoles and padding..made very well and comfortable for the feet!!