The 4SRT Knee Ascender has evolved over the last couple of years and is a hybrid of different set ups used by SRT specialists.The 4SRT knee ascender offeres a light weight and efficient way to climb SRT. You can view a Tutorial on how to use the 4SRT knee ascender here:
There are two different configurations; Standard and Deluxe, which consist of different hardware options. Each option can be chosen with a Floop size of your choice.

4SRT Knee Ascender Setup Standard consists of the following components:

DMM XSRE x2
Camp TurboChest Ascender
Elastic
Dyneema Loop
Floop (Climbing or Chainsaw boot)
Silverbull Harness Pouch