The ThermoBak S3L offers the same features and functionality that warfighters have come to trust in the ThermoBak 3L, but in a new design that optimizes the space on a users back and won’t interfere with a duty belt. The 3L, 100oz Mil Spec Crux reservoir delivers 25% more water per sip and the external fill allows quick access to the reservoir for refilling and cleaning.

• Fits a broad range of torsos; shorter, broader reservoir shape does not hang below beltline
• External fill design allows easy access to the Crux™reservoir for easy filling, cleaning and ice addition
• Two-zipper fill cover provides top or bottom of reservoir compartment entry points
• Quick-release shoulder straps unclip for easy removal and stow away inside built-in pocket
• Adjustable sternum strap
• Hook-and-loop strap management
• Six D-ring points for attaching to any armor vest or pack with MOLLE
• Fully insulated reservoir compartment using 5 mm closed cell foam
• Add or remove name tags and unit badges quickly with integrated hook-and-loop
• Grommet drain holes located at bottom of main compartment
• Uses 500D Double-rip Cordura® Fabric for the ultimate combination of strength and durability