FUNN Crossfire Seat Post - 31.6mm - Black - 400mm Length YGroup_7033711165485 and it's made of expandable

and it's made of expandable mesh

16 channeled cooling vents teamed up with the very minimalist fitting system will keep your melon cool too

Who is this for: Riders looking to make their bike more stable at high speeds

Materials / construction: Alloy lockring and spacers

FUNN Crossfire Seat Post - 31.6mm - Black - 400mm Length YGroup_7033711165485 and it's made of expandableSimple yet effective. The Funn Crossfire seatpost is a lightweight post with a tough bead blasted finish. Its designed for the rider that doesnt need a dropper post, but that still wants a post they can be proud of. The twin bolt design features a strong clamp thats easy to use with plenty of adjustability. Its available in 27. 2mm, 30. 9mm and 31. 6mm to fit in everything from your gravel bike, to your XC bike to your downhill bike.