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The Alpinestars ST-1 WP is a road-touring textile motorcycle jacket built around a fixed waterproof membrane, so it keeps rain out without a separate shell. A detachable 80g thermal liner (80g torso and sleeves) adds warmth on cold rides and stows in the large lower-back cargo pocket. Chest vents move air through on warmer days, and pre-curved arms with ergonomic elbows give a comfort fit that moves with you on the bike. It is aimed at touring and commuting riders who want one jacket for wet and cold weather; against sportier textile jackets it trades aggressive armor styling for all-weather practicality, and it pairs with the matching ST-1 WP pants.
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The ST-1 WP is a waterproof textile motorcycle jacket from Alpinestars. It has a fixed waterproof membrane liner for wet weather. A detachable thermal liner (80 g in the torso, 80 g in the sleeves) attaches with snap buttons and can be stored in the lower back cargo pocket. A pant connection zipper lets it join the ST-1 WP Pants and helps keep wind out.
The jacket has a comfort fit with pre-curved arms and ergonomic elbows. Sleeve volume adjusters with press buttons sit on the biceps, and the collar, cuffs and waist have hook-and-loop adjusters. The back is cut longer for more coverage in the riding position. Vent openings on the chest let air flow through.
CE Level 1 Nucleon Flex Plus armor protects the elbows and shoulders. Internal pockets hold a divided chest protector and a back protector, both available as optional accessories. The jacket is Tech-Air Ready.
