350g vs 400g hoodie: which one should you actually buy?September 21st, 2026
A 350g hoodie works for spring days and indoor layering; a 400g hoodie holds its structure, blocks wind and keeps its shape longer — for most buyers in autumn, 400g is the safer choice. The problem is that product pages rarely explain what those numbers actually change once the hoodie is on your back. We sew both weights in our own workshop, so this guide walks through where each one fits and how to decide between them. What the grams actually measure The number on a hoodie listing is fabric weight in grams per square metre (GSM). A 400g hoodie uses roughly 50g more cotton per square metre than a 350g one. That doesn’t sound like much on paper, but you feel it in three places: how the fabric drapes, how much wind gets through, and how well the body keeps its shape after a month of washing. If GSM is a new term for you, we put together a plain-language explainer in our GSM guide for pants and hoodies. Where a 350g hoodie works best A 350g hoodie is the one you reach for in mild weather and indoors. It layers under…
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