Altieri Flute Gig Bags, Backpack Style Alto/Flute/Piccolo Combo Altieri BagsSuperior QualityOur full line of custom case covers and padded gig bags for Woodwinds features large expandable zipper compartments that can accommodate sheet music, orchestra folios and collapsible stands Special accessory pockets carry everything from reeds to tuning forks To provide maximum thermal and moisture protection, Altieri case covers are constructed from tough, water-resistant black nylon for the outer shell, and an insulated liner This unique four-layer insulating material is designed to reduce heat loss in winter and heat gain during summer Two thermal layers, a plastic moisture barrier, heat reflecting mylar, plus a smart canvas coating combine to pad and insulate delicate woodwind instruments and their cases from the elements