This lightweight multiday womens pack from Deuter features a light and fast design that will keep you cool on your trekking adventures. Vari-Quick harness adjustment system lets you dial in the best fit quickly and easily. Deuter Aircontact Lite suspension features a special hollow foam which creates a pump effect, forcing warm air out and drawing cool air in. Hollow-core aluminum X-frame offers torsional rigidity, flexibility for body movement and effective weight transfer. Contoured, padded shoulder straps feature 3-D air mesh lining for breathability and stabilizer straps for ideal positioning of pack. Bi-laminate foam hipbelt uses a soft interior foam for comfort and a stiffer outer foam for weight transfer and lateral movement control. Top-loading main compartment offers lots of room for your overnight gear 2 side mesh pockets store your water bottles or snacks. Adjustable lid has 2 pockets for quick access to gear such as map, headlamp, first-aid kit, sunscreen and multi-tool. Extendable lid allows you to expand the collar, adding up to 600 cu. in. 10 liters of storage space. Hydration-compatible design features reservoir pocket and drink tube exit port for on-the-go hydration reservoir sold separately. Bottom compartment lets you stuff your sleeping bag or other light, bulky items directly into the pack shares a zippered separator with the main bag. Side compression straps let you cinch down loads for jostle-free carrying. Dual ice axe loops and front elastic cord are ideal for securing gear to the front of the pack. SL refers to Slim Fit, specifically designed with narrow, short shoulder straps and short back-system proportions for women. Slim womens fit also features more of a cant to the hipbelt than do unisex packs, softer edges on shoulder straps and a shortened overall back length.