Short answer: At roughly 5.1 inches (13cm), independent testing found the loft can force the neck into an unnatural upward arch for dedicated stomach sleepers, potentially causing strain rather than relief.
Why this warning appears directly on the homepage, not buried
But at 5.1 inches tall, it's a poor match for stomach sleepers is stated in the page's own opening lines — a genuinely upfront, honest disclosure rather than a footnote.
Why "potentially causing strain rather than relief" is a direct, meaningful phrase
This doesn't just say "not recommended" — it names the specific, opposite outcome a mismatched purchase could actually produce.
⚠️ Worth knowing: should have read the fit guide first — I'm mostly a stomach sleeper and the height just doesn't work for me, a genuine reviewer account reflecting exactly this mismatch.
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