The pro cyclists of Team Sky might just have a little sway with Castelli. Responding to the effectiveness of the Tempesta Knicker for cool, wet weather training, the ask for a pant that not only provided full length protection, but was also suitable for racing. Given that conditions can drastically change over a 200+km race in the cool, wet Spring season, the pant also had to be easily and quickly removable- while riding! Taking inspiration from so-called tearaway athletic warm-up pants, the designers took all the great fabrics and features of the Tempesta Knicker, added snaps to the sides, and you have the Tempesta FM Race Pant. And sure, most of us aren't pro's, but we often head out for long Spring and Fall training rides on rainy, cool mornings, and outerwear flexibility is desirable, especially when it lightweight, packable, and extremely effective. Essentially a flexible shell over-pant, the Tempesta FM Race Pant can be carried rolled up in a small, light but dense package that will fit in a jersey or jacket pocket. Or in the scenario above, worn at the outset, then removed, shaken off and stored for the next pass. At just 204 grams (medium), will enjoy full length leg protection that will keep you as warm and dry as possible, sparing your legs for the hours ahead.

The Tempesta FM Race pant uses a special combination of a highly breathable eVent® fabric, along with 3-layer waterproof Torrent fabric. These lightweight materials represent cutting edge technology in textile design. The cut is loose fit, with the carefully placed inserts in the Torrent material providing extra stretch where necessary- the backside, for example. All fabric seams are taped internally for total waterproofing. The Castelli exclusive eVent® material is an ultralight microfiber fabric that has almost unbelievable breathability. The pre-shaped knee provides ventilation while keeping rain out. Castelli anticipates that you will wear the Tempesta FM Pant over a bib short or knicker- this is outerwear. The side snap system Full Monty tear-away construction can be taken off while on the bike without un-clipping from the pedals (though we suggest when you can, stop and be as safe as possible). Clip attachments at the waist prevent accidental release. Word has it pro cyclists can get the pant off while riding in 10 seconds, so if you stop to remove and store, you can easily be back on the bike in under a minute.

The waist features a wide band with light elastic for a comfortable fit. The contrasting knee panels and reflective Castelli wordmark help to provide visibility. In other words, the details are just right. This highly technical, and exceptionally effective lightweight rain pant may force you to rethink your cycling wardrobe. It is so light, can be packed so small, and works so well you will likely carry it and use it far more than you would anticipate. And that is a good thing. Stay dry, keep warm, be flexible and protected with the Castelli Tempesta FM Race Pant.