Add to cart BGD – Concertina Bag $94.00 BGD’s ergonomically designed concertina bag is light and efficient. Redesigned from top to bottom this 3rd generation concertina bag is lighter and has half the pack size of previous model. Internal straps keep the glider in place, and the breathable mesh boarder lets you squeeze the air out to achieve a small overall pack size. Elegant new anti-snag YKK zip keeps your precious glider safe while greatly reducing the overall weight since there no need for a heavy overlapping strap. For those who prefer to leave their harness attached to the wing we have added a clever drawstring closure that neatly draws up around the lines. An external strap holds the folded bag together. Note: After endless testing we decided leading edge to trailing edge is the best direction for a smooth flow in folding your wing.