Top to bottom, this is Hydrapaks lowest profile flask. It slips right into the snuggest run belts and leanest vest pockets. The new 28mm locking cap easily opens and closes with a touch of a thumb, preventing leaks and drips while in motion. Made for minimal distraction, the innovative pinch-welded bottom gives it a tapered profile and the low-diameter cap makes it comfortable to carry — no pokes or irritation.

• Vest-pack fit provides bounce-free stability and a flexible flask shoulder to prevent chafing so you can focus on FKT's and PR's
• Soft, high-flow bite valve auto-seals after each sip, eliminating annoying drips
• Standard 28mm opening lets you fill the SoftFlask easily, holds 8 servings of energy gels or nutrition
• Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity
• 00% BPA & PVC free, wide working temperature range (can be frozen - max temp 60° C / 140° F)