The Spiuk Anatomic interior cycling shorts are designed to be worn under a pair of trousers on MTB rides. They are made of ErgodryFresh, a bi-elastic and highly breathable fabric, and are compatible with the Spiuk Anatomic MTB shorts. Include the Spiuk 300 Line chamois.Spiuk 300 Line Chamois: This chamois can resist intense rides lasting up to three hours. It is built with intermediate density foam with 2 levels of thickness. It is covered with bi-elastic, seamless fabric, with an anatomical shape that guarantees adequate protection, fit and freedom of movement.Features:- Bi-elastic and highly breathable ErgodryFresh fabrics- Waist with wide elastic band that avoids pressure points- Compatible with Spiuk Anatomic MTB Shorts- Spiuk 300 Line Chamois- Temperature range: 18º / 32ºCTechnology:- ErgodryFreshBi-elastic fabric with an extraordinary recovery. Instantly returns to its original shape without deforming.