Nearly weightless, this shell fits into its own chest pocket. Slide it on at the high point of your run or race route, then blast down the descent wearing a protective, wind-cheating buffer. It offers a close fit, but free movement of yours arms, shoulders and neck – even when zipped up to your chin.

• Advanced ripstop Skin Shield fabric is water-repellent, windproof, super packable.

• Material and patterning on the upper spine allows free neck and head movement.

• Underarm gussets let you reach out and up.

• Full front zip.

• Zippered chest pocket.

• Partly elasticized hem and cuffs.