In this weeks big competition we have one of Expeds fantastic new Skyline 20 hiking packs up for grabs read on to find out how to you could win this great prize!Your hiking pack is your trusty companion on the trail, and the new Skyline range of packs from Swiss brand Exped are as trusty as they come, with high quality materials and construction used throughout.The Skyline range consists of 12L, 20L, 30L and 45L models, all featuring bluesign certified outer material made of robust, recycled polyester, and anAir Flow back system that provides superior ventilation and comfort.The prizeOur prize, the Skyline 20, is a compact, lightweight, and versatile pack for light day hikes and bike tours, but also ideal for everyday use.The ergonomically shaped back system is flexible and adapts to your back, no matter the situation. The slim shape as well as the body-hugging fit ensure a high degree of comfort. Soft, breathable shoulder straps and a stowable hip belt provide optimal support.Theres plenty of storage options on the Skyline 20, and aconvenient large zipper opening runs from one side to far down the other side offering quick access to the main compartment. Cleverly positioned mesh pockets on the inside and on shoulder straps provide easy organisation for small items of equipment, andon the outside, a small zippered pocket as well as two side and front elastic mesh pockets provide more storage space. In addition, the backpack has a convenient attachment to your helmet. In wet conditions, an integrated rain cover with a reflective logo offers an effective water barrier.How to enterFor a chance to win this great prize, just answer the question below. Entries must be received by 30th October and the winner will be announced on 5th November.Whats the name of the back system used on the Exped Skyline 20 pack?A. Air HeadB. Air JordanC. Air FlowENTER YOUR ANSWER HERE!