Rubber sole The 3030 Eiger Lite EVO GTX RR BOA is the new standard in lightweight, technical mountaineering and ice climbing. At merely 890 grams and featuring the BOA Fit System, the latest Eiger in the Zamberlan collection will impress with its convenience, warmth and comfort, durability, and overall performance. An ideal boot for ice climbing and alpine expeditions, the Eiger Lite BOA is also built on Zamberlan's carbon fiber insole technology and features patented incorporations of the BOA Fit system.