Alphax Sliet Sliet Core Training Slippers for Indoor Use Slippers to Improve Core Strength Color: Black Size: 25-27cm Only tried on. Stored at home, and there is a slight lift on the right foot side. There is no problem with wearing it, but please consider it as a used item. You can train your core and aim for beautiful posture by standing with your core engaged. When shipping, it will be packed to fit a 60-size box. ↓ Excerpt from the manufacturer's product description Indoor slippers "Sliet (Sliet) for men" that allow you to train your core just by wearing them. You'll feel like you're being pulled back with your weight on your heels. The slope of the sole makes you conscious of your body's center of gravity being pulled back, which puts a squeeze on your lower abdomen, hips, and calves, leading to correct posture. Sliet is a slipper that trains your core by maintaining correct posture and using your muscles. Since you only need to wear them as slippers at home, it's easy to incorporate them into your daily routine and make them a habit. The three-dimensional insole fits your feet and is hard to slip off, making your feet less tired. It has elasticity in the heel and is lightweight and comfortable to wear. The bottom has non-slip grips. Suitable size: Foot size 25.0~27.0 (cm), Weight: 370g Material: [Body] Polyurethane, Polyethylene [Foot bottom] Polyethylene