Made to wear under your baggies, the Castelli Trail Liner prioritises comfort and breathability. It is made from light, airy mesh, with flat lock stitching ensuring a smooth finish, and is built around the soft KISS Air² seat pad.

There's no fear it will shift and allow the seat pad to move out of place as you ride, since the waist is secured with elastic, while the leg endings are held firm by GIRO⁴ grippers, with the silicone arranged in vertical lines to offer compression without pressure.

• Comfortable and breathable mesh undershorts
• Constructed with smooth, flat lock stitching
• KISS Air² seat pad delivers long distance comfort
• With elastic waist and GIRO⁴ leg grippers with raw edges