Bontrager B1 Sleeveless Baselayer

Stay cool with the Bontrager B1 Sleeveless baselayer; Bontragers lightest weight baselayer. Designed

Stay cool with the Bontrager B1 Sleeveless baselayer; Bontragers lightest weight baselayer. Designed to be worn as a first layer in warm temperatures, B1s ultra-light waffle knit construction reduces fabric-to-skin contact, creating air pockets next to the skin that aid in evaporative cooling.

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