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A lightweight mesh base layer makes you cooler, which surprises most riders. The mesh lifts your jersey a millimetre off your skin so air can move underneath, and it spreads sweat across a wider area so more of it evaporates. Evaporation is your cooling system, and a wet jersey plastered flat against your skin shuts it down.

Merino holds warmth when damp and resists odour over consecutive days, which makes it the winter and bikepacking choice. Synthetic knits move and release moisture faster, which suits heat and high intensity. Blends that put merino against the skin and synthetic where the wear happens give you most of both.

Snug. Wicking depends on the fabric touching your skin, so a base layer that drapes is doing nothing at all. Size to your normal fitted size and expect it to feel tighter than a jersey.

Italian brands including Castelli and Santini run smaller than Australian sizing, typically by one size. Pearl Izumi and MAAP run closer to true. Each product page links the brand's own size chart. If you are between sizes and want a race fit, size down. For a layered fit, size up. Our Adelaide showroom carries most of our range if you want to try before you buy.

Orders start processing within one working day of your payment clearing. Australian orders of $100 or more ship free, and worldwide orders of $190 or more ship free. Express Post within Australia is $19.95, and orders placed before 4pm ACST go out the same day and typically arrive in 1 to 3 days. Helmets and shoes carry a shipping surcharge and are excluded from free shipping.