Haworth Fern Chair: price & specs

Re-fetched both pages via fetch-clean.mjs and verified every non-null field verbatim. Haworth store product page (store.haworth.com/products/fern-office-chair) confirms: "12 year warranty"; "Warrantied for people up to 350 lbs without forward tilt option" (325 lbs with the forward-tilt option) → max_weight_lb=350 for base config; "Optional 4D Arms" that "adjust up and down, side to side, front to back, and pivot in and out" → armrests="4D"; "Back stop lets you choose an upright position or limit how much you can recline" → recline_lock=true; mesh listed as an upholstery/back option ("Choose from mesh, digital knit, gradient knit, or vegan leather. Breathable mesh lets air pass through") → back_type="mesh"; and that the built-in lumbar is passive while the height-adjustable lumbar (3.5" range) is a separate paid option → adjustable_lumbar=false. BTOD 2026 review corroborates the 12-year warranty, states the reviewed/configured price at "$1,500" (title and body), calls out the "mesh back edition" lumbar as a "$80" upgrade — consistent with adjustable_lumbar=false for the standard passive-lumbar config (catalog rule "false when passive-only"; Gesture precedent). Exact model confirmed (Haworth Fern Office Chair / Haworth Fern), not a Halo/Soji/Very/Zody sibling. seat_material and release_year not stated on either page → null. releaseDate null.