🧠 Ergonomic Neck & Back Design – Cradles your neck and supports lumbar spine. 📏 Lumbar Cushion Size: 42 × 38 × 12 cm / 16.54 × 14.96 × 4.72 in. Simply strap the cushions to your car seat. 📏 Neck Pillow Size: 28 × 22 × 12 cm / 11.02 × 8.66 × 4.72 in.