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The Castelli Phase Long-Sleeve Jersey uses strategically placed fabrics to keep our bodies comfortable and at the proper temperature during chilly rides. The brushed fleece interior is soft against the skin and offers superior warmth, while the sides and sleeves feature mid-weight Warmer X-Stretch fabric for a close-to-body fit with optimal freedom of movement. This long-sleeve form-fitting jersey allows us to replace our bulky jacket and even features three rear pockets to ensure we have the same storage we are used to having for essentials.