You’ll see a few names used for cushions that support your back on a sofa. The terms can overlap, but here’s a quick guide:

• Back cushions/backrest cushions: General, plush cushions that sit against the sofa back.
• Lumbar pillows: Smaller, firmer pillows targeting lower-back support.
• Reading/bed rest pillows: Upright backrests (often with arms) for sitting up to read or watch TV.
• Wedge or triangular bolsters: Angled cushions used on couches, daybeds, and headboards.
• Bolster/roll pillows: Cylindrical supports for additional positioning.

When browsing, check dimensions, fill type, and whether the cover is removable to match your comfort and style.

Replacing back cushions is mostly about fit and feel. A few steps can help:

1. Check attachment: See if your current cushions are loose or sewn in.
2. Measure carefully: Width between arms, height from seat to the top you prefer, and thickness of your current cushion.
3. Choose a fill: Foam cores tend to feel structured; polyester fiberfill feels plush; blended fills vary by firmness.
4. Match covers: Look for removable, washable covers to simplify care.
5. Compare specs: Use product dimensions and photos to gauge fit; a small variance can be okay depending on fabric and fill.

Filters for size, color, and material on product pages can narrow options efficiently.

You can fine-tune comfort without replacing everything:

• Fluff and rotate: Regularly redistribute fill to reduce flat spots.
• Add targeted support: Layer a lumbar pillow or a slim wedge behind the main cushion for extra lower-back lift.
• Adjust fill: If covers unzip, add or remove polyfiber to tweak firmness; insert replacements in the listed dimensions can also help.
• Stabilize placement: A non-slip mat behind the cushion can keep it upright and supportive.
• Swap covers: Breathable fabrics may feel cooler and cozier.

These adjustments can improve support and pressure relief, though results vary by sofa depth and cushion construction.

Some people are sensitive to new-furniture materials and finishes. Potential triggers may include fabric treatments, dyes, foam adhesives, or natural fills like feather/down. A few steps can help:

• Air it out: Ventilate the room and allow the couch and cushions to off-gas for a few days.
• Clean surfaces: Vacuum with an upholstery tool; wash any removable covers as directed on the care label.
• Add barriers: Use protective covers or throws as a buffer against direct contact.

If irritation continues, consider limiting exposure and consulting a healthcare professional for personalized guidance.

Care depends on the cushion’s construction. Start by checking the product label:

• Removable covers: If machine-washable, zip closed and launder gently in cold water; lay flat or tumble low if allowed.
• Non-removable covers: Vacuum regularly; spot clean with a mild soap solution and a soft cloth, testing a hidden area first.
• Outdoor/back cushions with water resistance: Rinse off dirt, clean with mild soap, and air-dry thoroughly before use.
• General tips: Avoid harsh chemicals and excessive scrubbing; rotate cushions to reduce uneven wear.

Following care instructions can help maintain color, shape, and comfort over time.