The VX Carbon is back in stock - 4,000 km wear-tested, 42% energy return
1.0L · cold 32h / hot 18h · 412g
Double-walled 18/8 stainless with a vacuum gap tested to hold ice water below 5°C for 32 hours at a 22°C ambient, and hot liquid above 60°C for 18 hours. Copper-lined inner wall, because the difference over a full training day is roughly four hours.
A 52mm mouth takes standard ice cubes and a bottle brush, and the lid seals against a silicone gasket rated for 5,000 open-close cycles. Fits a standard bike cage and every gym-bag bottle sleeve we could find.
Free 2-day shipping on orders over $75, dispatched from Boulder within 12 hours. Run in it for 90 days - if it does not hold up, send it back for a full refund.
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I rotate the Meridian through every easy day of a marathon block and measured the rebound myself at 640 km - still within 4% of new. The 10mm drop is forgiving at the end of a 35k when my form starts to fall apart.
Twelve weeks of heavy cleans and box jumps and the waistband has never rolled once. Compression still holds at the calf after about forty washes, which is more than I can say for the pair I replaced.
Wore the Stormline through the back half of a 100k in horizontal rain and stayed dry under it. Docking one star because the hood is cut tight over a cap - size up if you run in a visor.
I ran the Pulse against my chest strap for six weeks of track sessions. Average gap was around 2 bpm even on 400m repeats, and being able to pull raw FIT files without paying a subscription sealed it.
