Take the guesswork out of layering as you head out for a bike ride. The 4U bamboo arm sleeves turn your T-shirt into a long-sleeve in just a few seconds. Super compact and light to fit easily in a jersey pocket. They're so comfortable you’ll want to wear them even when you’re not cycling. Travel lighter, and stay warmer!
Presale orders are predicted to ship late December.
Made of antibacterial and sustainable bamboo fabric
Hidden thumb-loop for extra hand coverage
Useful for a variety of outdoor activities
Shade your arms from the sun
Compact when folded – 5x4x9cm / 1.8x1.5x3.6"
Light weight – 60g / 2oz
One-Size Fits Most – 19.7” (55cm) wrist-to-armpit length