At our headquarters in Northern Utah, the range of temperatures where a thermal jersey like Castelli's Puro 3 Jersey ranges from October through March. Castelli recommends it for temperatures down to 57 degrees Fahrenheit; however, we find that, as long as temperatures stay north of 45, we often only need a light baselayer and a little sunshine to stay perfectly comfortable in the saddle--especially during early spring intervals or those unseasonably warm afternoons in mid-November. When the temps (or the precipitation) do fall, the Puro 3 transitions to full-on winter when layered under a wind- and waterproof shell or rain jacket, adding thermal insulation to anti-weather pieces. Before the jacket comes out, the Puro 3's increased reflective zones help ensure you'll stay visible while squeezing out every last bit of daylight on early fall evenings. The secret to the jersey's versatility lies in Castelli's use of Warmer fabric, which now extends across the entire jersey. Previous generations used a lighter material on the sleeves, which stretched more but insulated less and often left our arms--already exposed--with less protection than our heat-generating core. Increasing insulation on the arms reduces heat lost in extremities and, by extension, heat lost at the core through blood circulation.
Options, sizes, colors available on Backcountry
Castelli Puro 3 Jersey - Men's
ships and sold by Backcountry
Price subject to change
*Shipping and Returns: Some exclusions apply, see cart on Backcountry for details
US-Parks.com has partnered with Backcountry to offer the best outdoor gear for your outdoors adventure
Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.