The distinction between 160gsm and 250gsm Merino wool lies in their respective weights, measured in grams per square meter (gsm). A higher gsm indicates a denser and heavier fabric, while a lower gsm means the fabric is lighter.The lighter 160gsm Merino wool is well-suited for warmer weather conditions, like summer, due to its lower weight and increased breathability, making it comfortable for various activities during hot days. On the other hand, the midweight 250gsm Merino wool offers excellent insulation and thickness, making it ideal for colder weather, providing extra warmth and comfort during chilly climates.Hence, when choosing between these two options, consider the specific weather conditions and activities to ensure the most suitable and comfortable choice for your needs.