Does it need a break-in period?

Give it a few weeks. Natural latex is responsive from the first night but a medium-firm 6-out-of-10 surface settles as your body adjusts to it, so the feel you get on night one is not the feel you keep. Rotate it head-to-foot occasionally to even out wear; the cover is removable and dry-clean only. The 365-night trial leaves ample room to pass through break-in before deciding.