13 kg/30 lb lift capacity Donut Wing. 18 kg/ 40 lb lift capacity Donut Wing for twin cylinders. 1680 DEN Ballistic Nylon outer shell. 420 DEN Nylon inner bladder. Stainless Steel back plate. Continuous harness with stainless steel back plate for optimal stability when using twin cylinders. Two shoulder D-rings and one waist stainless steel D-ring on the left side. 50mm wide crotch strap with two stainless steel D-rings. Single Tank system with single tank adapter and two super cinch straps.