Castelli Tutto Nano Bibtight bike tool The technical stretch fabric is

The technical stretch fabric is lightweight and designed to move with you as you adjust body positions to tackle obstacles

offering more compliance than our original fork

Designed for children aged 6 and up

500mm² contact area and composite body

You can expel any water that might get into the tube whilst swimming through the blow valve

Castelli Tutto Nano Bibtight bike tool The technical stretch fabric isThe Castelli Tutton Nano bibtight is made with Castelli's best all around fabric for winter tights: warm, stretchy, luxuriously soft, highly breathable and on top of that it features their proprietary third generation of nanotechnology water repellent finish. The fabric also makes for a great dry weather tight, and the reduced seam anatomical cut makes it extremely comfortable.