Shoulder season is the trickiest time of year to dress for, and arm warmers are the single most useful piece of gear for handling it. The Assos Spring Fall Arm Warmers P1 are built specifically for those rides where you start out in arm coverage and finish without it — or the other way around, depending on whether you're climbing or descending. Assos developed these specifically for the thermal demands of mid-season riding, when temperatures fluctuate between 10 and 18 degrees Celsius , which lines up with most spring and fall riding in temperate climates.

The fabric is a 78% polyester, 15% polyamide, and 7% elastane blend — a midweight construction that sits between a thin summer skin layer and a full-sleeve thermal jersey. That's the gap most cyclists actually need to fill. A skin layer gets overwhelmed once the temperature drops into the low 50s Fahrenheit, but a long-sleeve jersey turns into a sweat box the moment you hit a sustained climb. Arm warmers solve this by letting you adjust on the fly, and these pack down small enough to disappear into a jersey pocket when the sun comes out.

This version is updated with a textile that's more durable and packs down to smaller volume for storing in your pockets compared to previous generations. That matters more than it sounds — arm warmers live a hard life, getting yanked on and off mid-ride, jammed into pockets damp with sweat, and pulled over watches and bracelets a hundred times a season. The updated fabric is meant to handle that abuse without going saggy at the cuffs or developing thin spots at the bicep.... Read More