Donut X-Tech bladder 23 litres (for twin 15l.) in red Cordura. A valve is positioned on the front low left side and the inflator of 475mm / 19 is positioned centrally.
for Soprassub inflator 340, 400 or 600 mm
50mm or 40mm stainless steel
Works also as back polstering covering your backplate. To be attached with BP screws.