Protocol · 4 items
Heat
Stay cool. Hold pace.
Bundle price£259£233.10
AEvidence
KIT
Precool
Phase-Change Cooling Vest · Sizes S/M, L/XL
Start hot races cold.
Evidence grade AReusable
Size: S/MTrue to size
£140
1
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Evidence grade A
Overview
Phase-change packs hold 15°C for up to 2 hours, lowering skin and core temperature before you start. Precooling is one of the best-evidenced tools for performance in heat. Pull it on in the warm-up and take it off on the start line.
- 15°C phase-change packs, not ice
- Up to 2 h cooling
- Adjustable, fits over race kit
Technical specs
| Cooling | PCM packs, 15°C melt point |
|---|---|
| Duration | 60–120 min depending on ambient |
| Recharge | 20 min in iced water or 1 h in fridge |
| Weight | 1.6 kg with packs |
How to use
Wear for 20–30 minutes before and during your warm-up in hot conditions. Pair with an ice slurry drink for maximum effect.
The science · Grade A
AEvidence grade · Strong
Meta-analyses show that cooling before and during exercise improves performance in the heat, with mixed methods (vest plus ice slurry) among the most effective. Vests reduce skin temperature and perceived heat strain.
- Tyler CJ, Sunderland C, Cheung SS. (2015). The effect of cooling prior to and during exercise on exercise performance and capacity in the heat: a meta-analysis. Br J Sports Med.
- Bongers CCWG, Hopman MTE, Eijsvogels TMH. (2017). Cooling interventions for athletes: an overview of effectiveness, physiological mechanisms, and practical considerations. Temperature.
Claims & safety
Do not freeze packs below −5°C. Not for use on broken skin.
Part of a protocol
All protocols Works better together.
Heat Protocol
Pairs with
Same goal. Different frequency.
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