How it worksFrom kit to race-day plan, in four steps.
A research-backed sweat analysis by mail — no appointment, no travel. Here’s the whole process, start to finish.
01
Order your kit
It ships free and arrives in a few days.
02
Collect during a real workout
Wear the pads through a steady 45–60 minute effort in the conditions you actually train in.
03
Mail it back
Seal the bag, drop it in any mailbox. Postage is prepaid.
04
Get your number
Your sodium loss rate plus an hour-by-hour race-day plan.