Details Prana Tonga Tank The Prana Tonga Tank is a light vest top with wide elastic straps and embroidery details down the back. Made with Bluesign approved recycled polyester. Moisture wicking Double layer tank with novelty elastic straps Embroidery detail along back strap Raw edge hems Heat transfer logo at front corner Bluesign approved Material: 100% recycled polyester Specifications Tonga Tank