Trusted by The Guardian: As featured and recommended by The Guardian – a trusted voice in health and wellness. The SC Butterfly isn’t just another foam cushion. It’s scientifically designed to relieve tailbone pain, improve sitting posture, and reduce pressure on your lower back Innovative U-Shape Design: Unique tailbone cut-out for pressure relief, even weight distribution, and raised sides for hip support. Pre-shaped foam molds to your body for exceptional comfort and support. Upgrade to optimal comfort with our pressure relief cushion (18"L x 16"W x 4"H) and transform your sitting experience today. Note: For optimal comfort, we recommend this seat cushion for individuals weighing less than 200 pounds. For weights exceeding 200 lbs we recommend the upgraded version SC Butterfly XL Pressure Relief Seat Cushion: Split design targets pressure points on hips, thighs, coccyx for relief from lower back, hip discomfort, promoting proper posture. Ideal for long hours seated, offers relief from back and hip Thick Cushion Pad: 4.3" thick memory foam remains firm and supportive without going flat. The extra-dense bamboo charcoal-infused memory foam for freshness. Provides all-day sitting comfort Ease Of Use: Built-in handle to make it easy to carry. Breathable cover with zipper closure for easy machine washing. Non-slip bottom ensures grip, especially on leather seats, for secure placement. Removable cover maintains freshness, while the non-slip feature enhances stability Take Comfort Anywhere: ProtoArc seat cushion relieves lower back and hip discomfort, perfect for road trips, exercise, gaming. Standard size fits all body shapes, suitable for car seats, office chairs, wheelchairs, ensuring superior support and comfort anytime, anywhere Tips: 1. It may take 1-2 weeks to adjust to the cushion's shape for the first time. Many find relief from back and hip pressure while improving posture. 2.The cushion comes vacuum sealed so you will need to let it expand for an hour or two before first use