Keep your water cool and prevent bottle sweat. An insulated version of HydraPaks handheld SkyFlask Speed 350ml soft bottle, the SkyFlask IT Speed 350ml features IsoBound technology. Engineered to keep fluids at an ideal temperature 38% longer than a standard flask.

Covered by HydraPak's Beyond Lifetime Guarantee.

• The ideal hand-held solutionFor running, adjustable strap cinches down to fit different hand sizes
• SpeedFill capFlips open for quick refills and snaps closed for a spill-proof seal
• Four-layer designProvides users with more structure, an enhanced grip, and a no-sweat, comfortable carrying experience
• Compressible designShrinks as you drink, reducing water movement and easily stores in your pocket when empty
• Soft materialConforms to your hand and the precise fit means that you can run with a relaxed hand and still securely hold your water
• High-flow bite valveAuto-seals after each sip, eliminating annoying drips
• Large standard 42mm openingLets you fill the Skyflask easily with ice and drink mixes
• Ultra-durableAbrasion resistant TPU & RF welded seams for superior durability and elasticity
• VersatileCan be frozen or filled with hot water (max temp 60 C), 100% BPA & PVC free