>>723276739
Sketchers slip ins are designed like this, you only tie them once, the difference is that the lip is designed in a way that facilitates putting on the shoes without untying, and then the cushion grips the foot making them more comfortable to wear without retying them. More importantly this reduces the strain of putting on tied shoes because the lip guides and supports the foot as it's going into the shoe whereas a regular tennis shoes strains the lip and this damage gets compounded over time destroying the back of the shoe.