The difference between fleece-lined and non-fleece-lined garments is all about the extra cozy layer that fleece brings to the table. Fleece-lined pieces, like those offered by baleaf, feature a soft, insulating layer that adds warmth and comfort, making them perfect for chilly days. On the other hand, non-fleece-lined garments lack this extra insulation, which might make them more suitable for milder weather or layering under heavier outerwear.