Craft Base Layers

Fabric Tech Across the Seasons: From Nanoweight Mesh to Active Extreme X

Craft cycling base layers live or die on their fabric choices, and the range covers a genuinely wide spread. At the lightweight end, the Pro Dry Nanoweight and Coolmesh fabrics are built around maximising surface area - open, airy knit structures that pull sweat off your skin and spread it thin so it evaporates fast. On a muggy August climb in the Peak District, that rapid moisture transfer is what stops your core feeling like a wet sponge under your jersey. These aren't fabrics that simply declare themselves 'breathable'; the knit geometry does real mechanical work.

Flip to the colder end of the calendar and the Active Extreme X fabric takes over. The waffle-knit construction traps small pockets of dead air against your skin - basic insulation physics, but executed with tight enough tolerances that the layer stays thin and compressible under a jersey. It wicks effectively even when you're working hard on a long winter climb, so you're not soaking in sweat that turns cold the moment you crest the top and the wind hits.

The Gore-Tex Infinium Windstopper integration is the most targeted piece of engineering in the winter range. Craft places the Windstopper membrane across the chest and shoulder panels - exactly where a freezing headwind or fast descent cuts hardest - while leaving the back panels in standard breathable knit. You get a genuine wind block where you need it without trapping heat and moisture where your body generates the most. It's a meaningful trade-off handled sensibly, and it makes a real difference on exposed winter descents where a standard base layer simply isn't enough. If you're comparing options, Castelli base layers take a similar panel-based approach, though Craft's Scandinavian cold-weather tuning gives it a particular edge in raw warmth retention.

The Craft Range Explained: Pro, ADV, and Core

Craft organises its range into three tiers, and picking the wrong one is the most common mistake riders make. The Pro tier is cut for a race-tight, second-skin fit - fabric taut across the chest, nothing hanging loose. That precision fit is what makes moisture-wicking work properly; if the fabric sags away from your skin, sweat pools in the void rather than transferring through the material. Worth knowing: Pro runs small. Riders with a broader chest or shoulder measurement routinely need to go up a size, sometimes two. Check the size guide carefully before ordering.

The ADV tier is where most committed club riders land. It's tailored and close without being quite as unforgiving as Pro - enough structure to wick effectively, enough room to feel comfortable on a three-hour ride. This is the range that pairs naturally with Craft jerseys and sits cleanly under a bib without bunching.

Core is Craft's entry point - a relaxed fit aimed at everyday and commuting use. The fabrics are sound and the construction is honest, but if you're riding hard or for long periods, the looser cut works against you. Sweat management is noticeably less responsive than in the tighter tiers. Treat Core as a commuter or casual layer, not a performance one. On fit generally: Craft base layers are designed to be athletic and close-fitting across all tiers, so if you're used to looser Continental sizing, expect to reassess. Assos base layers and Endura base layers offer useful alternative fits if Craft's proportions don't work for your build.

Building a Layering System for UK Riding

A base layer doesn't exist in isolation - it anchors a layering system, and that system needs to flex across the UK's characteristically awkward shoulder seasons. In autumn, when mornings start at eight degrees and you're sweating by the first climb, a Craft Windstopper base layer paired with a standard long-sleeve jersey is a sensible starting point. The base handles wind block and moisture; the jersey adds light insulation and can be unzipped to vent. Simple, and genuinely versatile for October riding in the Yorkshire Dales or on the Chilterns.

Deep winter is a different calculation. An Active Extreme X base under a heavier Craft jacket gives you proper layered warmth - the base wicks and insulates, the jacket blocks wind and rain, and the system breathes without soaking through. Don't skip the base layer and rely solely on a thick jacket; you'll overheat climbing and freeze descending, which is exactly the problem a proper layering system solves.

Summer riding is where riders most often talk themselves out of a base layer, and most often regret it. A Pro Dry Nanoweight layer under a lightweight jersey keeps sweat off your skin and means you don't chill on fast descents or when the temperature dips unexpectedly. UK summers being what they are, that drop can come out of nowhere. Pair it with Craft bib shorts and you've got a coherent kit system from a brand that designs its garments to work together.

On washing: this matters more than most riders realise. Wash at 30 or 40 degrees and never use fabric softener. Softener coats synthetic fibres with a waxy residue that blocks the moisture channels in the knit - the very mechanism you bought the base layer for. A few washes with softener and your Active Extreme X performs like a budget cotton tee. Tumble drying on high heat is similarly damaging. Cold rinse, air dry, and these layers last for years. Gore base layers carry the same care requirements if you're mixing brands across your kit.