Psicobag is a waterproof, accessible, chalk dispersal system for the deep water solo climber. Psicobag uses a system of valves to spray chalk powder onto the hand when pumped, then seals instantly upon water submersion so the chalk remains dry and ready for the next ascent of the rock face.
Siever, Shane, "Psicobag" (2017). Program of Industrial Design Capstones. Paper 3.