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Keep life moving with a Hydro Flask 21 oz bottle and Standard Flex Cap. It stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough ice cold goodness to keep you going for hours without weighing you down. No wonder it's one of their bestselling water bottles.
DETAILS
- Versatile, middle-of-the-road size
- Insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours
- Durable 18/8 Pro-Grade stainless steel construction
- BPA-free and Phthalate-free
- Compatible with Standard mouth Insulated Sport Cap
- Lifetime warranty
Fitting Chart
Notes About Measuring Your Feet
Because they are flat, rulers can only approximate the size of your foot. Don't forget that manufacturers measure shoe sizes differently, and as a result, sizes may vary. When measuring your foot, ensure that you are standing and wearing the socks or stockings that will be worn with your new shoes when they arrive.
Still need help? Call us! 1-866-925-6880
If you have questions, Quark Shoes support is available Monday to Friday 8am to 9pm and weekends 8am to 4:30pm CST.
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 4 | 35 | 1 | 8.1875 | 20.8 |
| 4.5 | 35 | 1.5 | 8.375 | 21.3 |
| 5 | 35-36 | 2 | 8.5 | 21.6 |
| 5.5 | 36 | 2.5 | 8.75 | 22.2 |
| 6 | 36-37 | 3 | 8.875 | 22.5 |
| 6.5 | 37 | 3.5 | 9.0625 | 23 |
| 7 | 37-38 | 4 | 9.25 | 23.5 |
| 7.5 | 38 | 4.5 | 9.375 | 23.8 |
| 8 | 38-39 | 5 | 9.5 | 24.1 |
| 8.5 | 39 | 5.5 | 9.6875 | 24.6 |
| 9 | 39-40 | 6 | 9.875 | 25.1 |
| 9.5 | 40 | 6.5 | 10 | 25.4 |
| 10 | 40-41 | 7 | 10.1875 | 25.9 |
| 10.5 | 41 | 7.5 | 10.3125 | 26.2 |
| 11 | 41-42 | 8 | 10.5 | 26.7 |
| 11.5 | 42 | 8.5 | 10.6875 | 27.1 |
| 12 | 42-43 | 9 | 10.875 | 27.6 |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 6 | 39 | 5 | 9.25 | 23.5 |
| 6.5 | 39 | 5.5 | 9.5 | 24.1 |
| 7 | 40 | 6 | 9.625 | 24.4 |
| 7.5 | 40-41 | 6.5 | 9.75 | 24.8 |
| 8 | 41 | 7 | 9.9375 | 25.4 |
| 8.5 | 41-42 | 7.5 | 10.125 | 25.7 |
| 9 | 42 | 8 | 10.25 | 26 |
| 9.5 | 42-43 | 8.5 | 10.4375 | 26.7 |
| 10 | 43 | 9 | 10.5625 | 27 |
| 10.5 | 43-44 | 9.5 | 10.75 | 27.3 |
| 11 | 44 | 10 | 10.9375 | 27.9 |
| 11.5 | 44-45 | 10.5 | 11.125 | 28.3 |
| 12 | 45 | 11 | 11.25 | 28.6 |
| 13 | 46 | 12 | 11.5625 | 29.4 |
| 14 | 47 | 13 | 11.875 | 30.2 |
| 15 | 48 | 14 | 12.1875 | 31 |
| 16 | 49 | 15 | 12.5 | 31.8 |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 8 | 24 | 7 | 5.8 | 14.6 |
| 8.5 | 25 | 7.5 | 6 | 15.2 |
| 9 | 25 | 8 | 6.2 | 15.6 |
| 9.5 | 26 | 8.5 | 6.3 | 15.9 |
| 10 | 27 | 9 | 6.5 | 16.5 |
| 10.5 | 27 | 9.5 | 6.6 | 16.8 |
| 11 | 28 | 10 | 6.8 | 17.1 |
| 11.5 | 29 | 10.5 | 7 | 17.8 |
| 12 | 30 | 11 | 7.1 | 18.1 |
| US Sizes | Euro Sizes | UK Sizes | Inches | CM |
|---|---|---|---|---|
| 13 | 31 | 12 | 7.5 | 19.1 |
| 13.5 | 31 | 12.5 | 7.6 | 19.4 |
| 1 | 32 | 13 | 7.8 | 19.7 |
| 1.5 | 33 | 14 | 8 | 20.3 |
| 2 | 33 | 1 | 8.2 | 20.6 |
| 2.5 | 34 | 1.5 | 8.3 | 21 |
| 3 | 34 | 2 | 8.5 | 21.6 |
| 3.5 | 35 | 2.5 | 8.6 | 21.9 |
| 4 | 36 | 3 | 8.8 | 22.2 |
| 4.5 | 36 | 3.5 | 9 | 22.9 |
| 5 | 37 | 4 | 9.2 | 23.2 |
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