Why people choose us. Magma Rolltop Backpack III. The new Rolltop Backpack III is an extremely rugged, entirely waterproof and multi-functional backpack that is suitable for a wide variety applications. From carrying your DJ- equipment, to convenient carry-on luggage, or just as a regular daypack, the Rolltop Backpack II does it all well. Its bicycle messenger inspired design features a variable “rolltop” opening that gives you an extra 24 cm when unfolded to fit oversized gear like the Pioneer DDJ-SX2/DDJ-RX, the Numark NS-6, 2-octave keyboard controllers, or even multi-effect pedals. It also features a separate, easy accessible and waterproof-zippered laptop compartment (up to 19”) as well as two additional accessory pockets to stow smaller items as audio interface, headphones, adapters and cables. The ergonomic, S-curved backpack straps, the well-padded cushioning panel, and the hip & chest belts, provide a high level of comfort for your spine and make it comfortable for walking and city biking. For perfect protection of the controller we recommend to use additionally the MAGMA CTRL CASE or a Decksaver cover. Especially designed to carry the MAGMA CTRL CASE series. Fits every controller from Pioneer DDJ-SX2/DDJ-RX to Numark NS-6, Traktor S5/S4/S2, American Audio VMS4, Denon DN-MC-6000, Akai MPK-25 and more! Flexible height adjustment through variable rolltop closure. Durable and waterproof Tarpaulin. Zippered side access laptop compartment with waterproof zippers. Two accessory pockets with waterproof zippers. Ergonomic padded back panels, s-curved backpack straps, chest strap and hip belt. Hand-luggage compatible (up to 56 cm height). DJ Controller w/ Magma CTRL case or decksaver. External (H/W/D): 53 – 75 x 33 x 20 cm / internal: 51- 70 x 32 x 19 cm (main compartment). Why people choose Bop DJ..