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For riders who refuse to hang up the bike when winter hits, the Summit AmFIB® Alpha Pant is built to go deep into the coldest months with purpose-driven performance.

Our warmest mountain bike pant uses strategically mapped Polartec® Alpha® Direct insulation across the seat and thighs to deliver breathable warmth where it matters most—keeping you dry and thermally balanced during high-intensity efforts. AmFIB® softshell fabric wraps the legs in windproof, water-resistant protection, while a PFAS-free PI Dry® finish ensures eco-conscious moisture management in variable conditions.

Zippered Trail Access pockets secure essentials without disrupting your pedal stroke, and tapered cuffs with zip openings offer versatile fit over a range of footwear. Designed to layer comfortably over your go-to liner shorts or thermal cycling bibs, this pant unlocks cold-season trail potential with every turn of the cranks.

Part of our Ride 365 philosophy, it’s made for those who see winter not as a break—but as a challenge to keep going.

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Men's Summit AmFIB® Alpha Pants(36 / PHANTOM)

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