Thin tees cling to the chest, twist at the seams and lose their collar by summer. Ours start at 200 g/m² in GOTS organic cotton and go up to 237 g/m² in combed ring-spun cotton — heavy enough to hang straight off the shoulder, with reinforced necklines on the heavyweight cuts so the collar stays flat. Prefer something closer to the body? There's a fine jersey fitted tee for layering.