Legwarmers live or die on whether they stay where you put them. The Spring Fall RX Legwarmers P1 from ASSOS address that with a silicone gripper at the thigh and a pattern shaped to the bent knee rather than a straight leg, which is the position they actually spend the ride in. The RX designation puts these in the shoulder-season bracket — heavier than a summer arm or knee piece, lighter than the full winter Ultraz range — so the target window is roughly 8 to 18 degrees Celsius depending on how you run.
The fabric is a brushed-back thermal knit. The face is smooth so it sits cleanly under bib shorts and doesn't catch on the leg opening when you pull them on, and the brushed interior traps a layer of warm air against the skin. That interior surface is also what makes these tolerable on a climb, because the nap lifts the fabric slightly off the leg and gives sweat somewhere to go rather than pinning a wet layer against you. Flatlock seams run the length of the panel to keep the stitching from creating a pressure line behind the knee.
Fit is where the shoulder-season warmers earn their keep or become drawer filler. ASSOS cuts the P1 pattern with a pre-shaped knee and a tapered calf, and the upper hem is wide enough to overlap the leg gripper of a bib short without doubling up into a band that digs in. Get the overlap right — legwarmer under the short leg, not over it — and the two grippers work together instead of fighting each other.... Read More
These are a full-length piece, running from upper thigh to just above the ankle, so the coverage is continuous with a mid-cut sock. If you're building a shoulder-season kit rather than buying a single item, legwarmers are the piece that extends the usable range of your summer bibs by several weeks on each end of the year, which is a better return than buying a dedicated pair of thermal bibs you'll wear a dozen times. The Blackseries colorway keeps them neutral against any bib short in the drawer.
