2 tri-lock-carabiners (to open with one hand)
4 slings
climbing harness

Check material and harness (four eyes principle). For the ascent use one sling for protection and two slings for the feet. Then, remove the lower foot sling and attach it above the protection sling to use it as new protection sling (only open the first protection carabiner once the second is securely fastened). Use the free sling for the free foot and repeat the procedure. When installing the slings make sure that the distance between the slings is not too large, because the drop height increases and standing up becomes more difficult.