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Add the 2XU Thermal Arm Warmers to your kit, and you'll be ready when the weather turns nasty. The warmers are woven from yarns impregnated with silicone to fend off rain --even when you're hammering hard to get home. The flatlock seams mitigate chafing and irritation, and each cuff has a silicone gripper to keep the warmers in place. 

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I'm a 5'4" woman about 129 I wear a medium...

I'm a 5'4" woman about 129 I wear a medium in the 2XU trisuit. Is this a men's or women's sized product?