Super strong wood and very thick durable canvas! Design: The chair is constructed with American basswood slats and a 100% cotton canvas covering, which gives it both strength and flexibility. Its ergonomic design embraces the user's back to promote proper posture and lift the upper body, which relieves pressure on the neck, shoulders, and lower back. Portability: It weighs less than 3 lbs and features a roll-up design with a carry strap, making it easy to transport and store. Versatility: The Orthoseat can be used on various surfaces, including couches, office chairs, bleachers, car seats, SUP, and even directly on the floor. I’ve considered using it in my kayak
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