éSpecifications: Material: Silicone Size: NO.1=2.67inch, NO.2=2.48inch, NO.3=2.36inch, NO.4=2.28inch, NO.5=2.12inch, NO.6=1.96inch Color: black, black-1, blue, grey, pink, purple, red, sky blue, white, yellow Quantity: 12pcs/set Aplication for: Running, Cycling, Football, Soccer, Golf, Tennis, Volleyball, Skating, Hiking and other Outdoor Activities. Features: 1. SENT CHARM no-tie shoelaces are the world's first silicone shoelace which provides an easy-to-use, comfortable and stylish addition to any shoe! 2. SENT CHARM Silicone is a kind of material with flexibility and durability.Unique grip design, can bear greater tension, so that the shoe laces is difficult to separate from the holes. 3. SENT CHARM silicone shoelaces are waterproof and won't get wet in the rain or snow. When they get dirty, simply wipe them off with a wet cloth and they will look brand new! 4. Easy to lace, and needn't to tie once lacing on, once and for all! SENT CHARM no-tie shoelace make you save more time. 5. SENT CHARM flaxible shoelaces will adjust its tightness so that you don't need to worry the size will not fit you. How to use : 1.Choose the correct shoelace 2.Fasten start with the bottom shoe hole which are near the toe 3.Push the hook into the shoe hole,and pull it insides 4.Until the hook jammed the hole 5. Repeat it on the other side 6.Align the eyelets on the both side 7.Complish Package included: 1 set shoelacesé