When drawing up your list of clothing to take to the UTMB®, waterproof garments are essential: they must meet the race rules and provide the protection you need.
What do the race rules say?
UTMB® rules require every runner to carry a hooded jacket with a waterproof, breathable membrane capable of withstanding bad mountain weather. It must have a waterproof rating of at least 10,000 Schmerber and a breathability rating of RET below 13. The hood must be integrated or attached using the manufacturer's original system, and the seams must be sealed. For the lower body, the rules require full-length trousers or running tights paired with waterproof overtrousers, or full-length trousers that are fully waterproof. These garments may be checked when you collect your race bib: without compliant kit, you may be refused permission to start.
For comparison, the Diagonale des Fous sets out the same requirement differently: it requires a waterproof jacket with a hood and heat-sealed seams, and explicitly rules out windproof jackets as insufficient protection.
Which jacket should you choose?
At Cimalp, the Storm Pro exceeds these requirements thanks to its three-layer Ultrashell® membrane: a waterproof rating of 20,000 Schmerber, breathability of 80,000 g/m²/24h, resistance to strong winds of 60 to 90 km/h, and a lifetime repair guarantee. It comes in a men's version (Storm Pro 4H, 290 g in size M) and a women's version (Storm Pro F, 260 g in size S).
Choose a close fit without going too tight, so you can move freely, especially through the arms.
Which trousers should you choose for the UTMB®?
For your lower half, the Storm Pro Pant overtrousers deliver the same performance as the jacket: a 20,000 Schmerber waterproof rating, breathability of 80,000 g/m²/24h, resistance to winds of 60 to 90 km/h and a lifetime repair guarantee, at 300 g in size M. They can be worn alone or over thermal leggings in cold weather.
Frequently asked questions
What is the minimum waterproof rating for the UTMB®?
The rules require a waterproof rating of at least 10,000 Schmerber for both the jacket and the waterproof trousers or overtrousers, plus a breathability rating of RET below 13.
Can a windproof jacket replace a waterproof jacket?
No. The rules require a waterproof, breathable membrane with sealed seams, which a windproof jacket does not provide. Kit is checked when you collect your race bib.
Are overtrousers compulsory even if rain is not forecast?
Yes. It is compulsory kit checked when you collect your race bib, regardless of the forecast. Mountain weather can change quickly.
