Enhanced Large Size Design: The gel cushion measures 17(L) x 15(W) x 1.2(T) inches with double gel pad design for maximum thickness and comfort Ultimate Cooling Comfort: Thick honeycomb gel design increases air flow for cooling comfort, prevents seat sweating, and features a ventilated mesh cover that stays cool unlike memory foam models for extended sitting periods Waterproof Gel Construction: Waterproof gel cushions can be used in bathing, swimming, boating, kayaking, kneeling gardening, or outdoor patio chairs for versatile applications Breathable Heat Dissipation System: Honeycomb design features built-in free flow air ducts to prevent seat sweating and maintain comfortable heat dissipation with high resilience for extended use without fatigue Superior Durability and Elasticity: Gel cushion features exceptional cushioning properties that protect delicate items, with highly elastic gel material that returns to its original shape after stretching and squeezing for long-lasting durability Non-Slip Cover Design: Includes a non-slip cover that keeps the cushion securely in place on chairs, car seats, office chairs, desk chairs, and wheelchairs Multi-Purpose Application: Suitable for use in various settings including home, office, car, wheelchair, and outdoor environments to provide comfort during long sitting sessions Large Gel Seat Cushion for Long Sitting With Non-Slip Cover,Soft & Breathable,Seat Cushion For Chair,Car ,Office,Desk Chair,Wheelchair (17" x 15" x 1.2" - Blue)