Fly Racing Base Layer Bottom

At 120g, the base layer bottom uses a 92% polyester, 8% spandex compression fabric with flatlock stitching, built for riders layering under motocross, off-road or touring pants rather than as standalone protection on its own. There's no armour built in; the design is entirely about fit and moisture management beneath boots, knee braces and riding pants. The compression cut sits close to the skin without restricting the crouching or shifting movements typical of off-road riding, and the ergonomic paneling is mapped specifically for a riding rather than a running or gym position. That focus on fit over standalone protection is typical of a dedicated base layer rather than an armoured garment.

The fabric pulls sweat away from the body, helping regulate temperature whether conditions are hot and humid or cool enough to need extra insulation over the top of it. Flatlock seams cut down on the friction points that develop under heavy-duty riding pants and armour over a long day on the bike, and the anti-odour treatment is useful across consecutive days of riding without washing gear between sessions. The waistband, however, has a tendency to roll on longer rides, which becomes a mild but repeated annoyance over a full day. Riders doing back-to-back motocross sessions will notice the odour control holding up better than a plain cotton alternative across a full weekend.

This suits riders wanting a dedicated layering piece for both summer sessions and as a thermal foundation under heavier gear in colder months, working equally well under motocross jerseys or touring pants. It isn't warm enough on its own for genuine cold, where a proper thermal base layer will do noticeably better, and the snug sizing runs small enough that some riders will want to size up. For anyone building a consistent layering system, though, it delivers dependable moisture control and freedom of movement at a reasonable price point. Riders building a full riding kit from scratch will find this a sensible starting point before adding heavier outer layers on top.