XS Scuba Standard Backpack. 

Features:

• Traditional single tank backpack
• Blow-molded plastic construction
• 2” (50 mm) black harness webbing
• Adjustable tank band with cam buckle
• Will accommodate 6.9” (175 mm) to 8.0” (203 mm) cylinders
• SS quick-release at shoulder and waist
• Built-in carry handle
• Overall length 15” (38 cm)
• Consider adding a pair of HL805