RAB says about the Muon ND 40
For fast-moving hikers covering long distances with lighter kit, this women's/narrow fit 40L pack features easy-access roll top entry. With tough, ultralight Spectra® Ripstop fabric and close-fitting TRI-FLEX™ carry system for all-day comfort. TRI-FLEX™ carry system is light and stable with wrap around harness construction for optimal comfort. Shaped lumbar pad and supportive hipbelt provides comfort on long days. Forward pull hipbelt for easy adjustment and stability. Roll top closure allows pack to expand and compress as your kit changes. Top compression strap helps to stabilise the load. 2 harness pockets and 2 large side stash pockets provide on the go storage. Large front stash provides quick-access extra storage. Ultralight compression; lower straps ideal for carrying extra equipment. Large external and internal zipped pockets for secure storage. Collapsible and Z folding pole carry compatible. 3 litre H2O bladder sleeve with dual exit option. Webbing ladder on pack body for additional storage