Modlily and sites like them offer clothing items that often look well-made and flattering on their website but are actually made with synthetic materials and lack even the simplest detailing, like a hem, to give clothing a finished look. Then, when you dare to return the items they charge a shipping fee, which is usually substantiative in comparison to what you've ordered, with the hope that you'll agree to do an exchange for other poorly made items rather than ask for your money back.