The breathable, trapezoidal AeroCover Ripstop-Polyester fabric is water resistant and reduces condensation, very durable, lightweight material, handy to use and space saving, cord/stopper at bottom for optimal attachment, protects against discoloration, including practical storage bag, L-shaped lounge platform with 90-degree corner, left (When you sit in the corner of your sofa, the longest part is left of you).