The most common way is via the seat post

don't they

the Maxxis Ardent rolls like a champ

With a DWR finish that sheds moisture

this is probably it

Fox Defend Youth Short Sleeve Jersey - XL - Steel Grey algolia-ignore The most common way isThe Fox Defend Youth Short Sleeve Jersey offers the same quality materials and design as the adult option, just sized down a bit to fit little shredders. The Defend is ready to tackle all the trails that kids can throw at it. With strategically placed abrasion resistant zones that help protect you and the jersey from those crashes and tumbles. This jersey has excellent airflow with the aid of TruDri Fabrics and large mesh panels to help keep sweat