Zip-up hoodies need to balance warmth with easy layering, so we suggest different fleece weights by season. For spring and indoor-focused programs, 280–320gsm loopback gives good structure without being too hot. For colder markets, 340–400gsm brushed fleece delivers a denser, warmer handfeel that still layers under jackets. We also consider shrinkage, bulk and drape after washing so the zips keep running smoothly and the hoodie keeps its intended silhouette.