Lowe alpine alpine ascent 4050 backpack the alpine ascent 4050 is a clean and lightweight pack your ideal companion on high alpine peaks winter climbs and summer rock routes harness compatible with gear loops compression straps and an under lid rope strap this lightweight top loading pack is perfect for long summer rock days high in the mountains ever versatile however the alpine ascent is also fully equipped to take on snow and ice with our unique double headlocker ice axe attachment